I may also be scanning some of these glasses for archival purposes when sold, so ask about that process if the glass is no longer available as original.
NOS GLASS costs from $250 - $450. Plexiglass or glass monitor bezels are $50 - $100.
USED GLASS costs from $50 - $300 depending on condition.

SECTION 1 - TOP SHELF - most are boxed - NOS
Williams - Sniper Gun - NOS - $300
Williams - Space Pilot - NOS
Williams - Magor League - NOS - $400
Williams - Riverboat - NOS - $450
Williams - Hit and Run Base-Ball - NOS - $350
Williams - Make Trax - NOS - $100
Segasa DBA Sonic - Butterfly - NOS - $300
Chicago Coin - Twinky - NOS
Sega - Rodeo - NOS
Williams - Star Gate monitor bezel glass - NOS - $100
Bally - Twin Win - NOS
Bally - Nip It - NOS - $450
Williams - Big Ben - NOS
Interflip - Alaska - NOS
Bally - Big Show - NOS
Williams - Big Daddy - NOS (20" X 24")
Williams - Triple Strike - NOS
Sega - Butterfly - NOS
Bally - Circus - NOS
Bally - Joust - NOS
Gottlieb - Spin Wheel - NOS
Sega - Mars Trek - NOS
SECTION 1 - MIDDLE SHELF (right to left) - most NOS
Williams - Space Odyssey
Midway - Dogfight (NOS) - $350
?? - Circus - plastic - NOS (sealed)
Gottlieb - Duotron (NOS) - $350
Fisher - Skyhawk x 5 (NOS) - $75
Gottlieb - Hot Shot (NOS) - $350 (22" X 26")
Unknown Crackshot (used)
Chicago Coin - Speedway (Mark III) Plexiglass NOS - $150
Allied Leisure - Super Shifter (NOS) - $300
Allied Leisure - Sea Hunt (NOS) - $250
Sega - Attack playfield (NOS) (EM arcade game) - $350
Allied Leisure - Supershifter x 2 (used)
Atari - Sprint (open box) monitor bezel
Sega - Drive-Mobile NOS - $400
Sega - Astrodata - NOS - $350
Williams - Pennant Fever (used) - $125 Front, Rear
Bally "Baby Pacman" (7) - $100US Front, Rear
Sega - Gorrila Fighter x 2 (used)
Gottlieb - Big Shot (used) (22" X 26")
Williams - Stargate monitor bezel - glass - $100
Gottlieb "Dragon" (9) - $175US and a second one that is a (4) - $95US Front, Rear
Bally - Dolly Parton (used) Front, Rear
Williams - Satin Doll (used) (28" X 25")
Williams - Time Warp (used) X 2 - $150 - $250 Front, Rear
Bally - Evel Knievel (NOS) (rear) (packing)- $450 (Evil Kneivel)
Interflip - Alaska (NOS) - $300
Allied Leisure - Boogie (NOS) X 2 - $250
Gottlieb "Totem"(8) - $140US Front, Rear (26" X 28")
Gottlieb - Timeline (used) Front, Rear
Gottlieb - Straight Flush (used)
Williams - Spooks (so-so) flaking - $125
Sega - Missile (used) - $300
Williams - Triple Strike (used)
Williams "FirePower" (7) - $125US Front, Rear
Gottlieb "Joker Poker" (6-7 crinkling paint near bottom) - $125 Front, Rear
Bally - Knockout (NOS) - $350
Allied Leisure - Boogie - NOS
Williams - Hyperball (NOS) - $250
Williams - Jungle lord (NOS) production version - $450 Front, Rear, Rear detail
Sega - Killer Shark (used with a broken corner) - $200
Williams - Space Odessy - NOS - tiny scratch at bottom - $250
Midway - Invaders From Outer Space (gun game)
Williams - Argosy (NOS) - $350
Gottlieb - Panthera (5) - $100US Front, Rear
Stern "Trident" (7) - $125US Front, Rear
Atari "Time 2000" (9) - $150US Front, Rear
Gottlieb "Cleopatra" (7) - $140US Front, Rear (28" X 29")
Bally "Eight Ball Deluxe"(8) - $175US Front, rear
Williams Hot Tip x 2 (NOS) - $350
Williams Contact (NOS) - $350
Williams - Algar (NOS) - $350
Sega - Prospector (NOS) - $350
Bally - Knockout (NOS) - $300
Bally - Nip-It (NOS) - $400
Americoin - Shuffleboard (NOS) - $150
Ramtek - Baseball glass - NOS - $100
Chi-Coin - TRAP SHOOT (NOS)
Bally - Hi-Lo ACE (NOS) - Front picture, rear picture
Williams - DEFENDER monitor plexi (NOS)
Chi-Coin - DEFENDER MACHINE GUN (NOS) - Front picture, rear picture
SECTION 1 - Bottom shelf (left to right) - most NOS
Atari - Atarians (9) - $175
Data East - Robocop (9) - $175
Williams - Time Warp x2 (used)
Segasa DBA Sonic - Butterfly (used)
Williams - Aztec x2 (1opened box 1 used)
Williams - Phoenix x2 (used) - $150
Williams - Phoenix (NOS) - $250
Williams - Space Mission (NOS) - $300
Williams - Disco Fever (opened box) - $250
Williams - Upper Deck - Two of these factory Plexiglass NOS - #1 front, #1 rear, and #2 front, #2 rear. $350 each.
Sega - Missile (used) - $300
Sega - Moto Champ (corner broken) - $275
Williams - Rancho (NOS) - $300
Williams - Tri Zone (used) - $175
Gottlieb - Dragon (used)
Chicago Coin - Speedway (Mark III) Plexiglass $100
Atari - Outlaw (used) monitor bezel - $50
Gottlieb - Grand Slam (4) - $150US Front, Rear
Gottlieb - Cleopatra (very used) (28" X 29")
Midway - Omega Race (used) monitor bezel
Gottlieb "Slick Chick"(5) - $100US
Stern "Lectronamo" (6) - $75US Front, Rear
Williams - Firepower - used - $200
Williams - Robotron monitor bezel - NOS - Glass - $100
Midway - Wild Kingdom
Recel - Lady Luck (NOS) - $350
Gottlieb - El Dorado (NOS)
ChiCoin - Speedway (Mark III) Plexiglass NOS - $150
Williams - Moulin Rouge 1965 (used)
Allied Leisure - Tennis Tourney monitor bezel (NOS) - $100
Williams "Black Night" (6 - 7) - $150US Front, Rear
Universal - Space Panic/Cosmic avenger? (used)
Gottlieb - Sinbad - an 8 $140US, and a 7 for $125US
Williams - Pheonix - NOS - $350 Front, Rear
Southland Engineering - Little Pro golf (used) Front, Rear
Sammy - Tank (very very used) - $50
Williams - Stargate x 4 (NOS) - Glass monitor bezels - $100
Atari - Asteroids cocktail glass - NOS - $250
Recel - Fortune - NOS - $300
Segasa DBA Sonic - Mars Trek - NOS - $300
Segasa DBA Sonic - Butterfly (NOS) - $300
Chicago Coin - Prime baseball (NOS) - $300
Recel - Space Race - (NOS) - $300
Recel - Lady Luck - NOS - $350
Recel - Space Race (NOS) - $300
Recel - Icarus (NOS) - $300
Recel - Poker Plus (NOS) - $300

SECTION 2 (boxed - most NOS)
Bally - Sky Kings - NOS
Atari - Asteroids cocktail glass - NOS
Chicago - High Score Pool
Williams - Make Trax
Gottlieb - Top Card - NOS
Williams - SS Hot tip - NOS
Williams - Aqua Gun - NOS - $300
Chicoin - Flying Ducks
Segasa DBA Sonic - Butterfly
Williams - Hit and Run Base-Ball - NOS - $350
Williams - Jungle Drums - NOS - $450
Chicoin - Ping Pong
Chicoin - Big Hit - NOS - $400
Chicago Coin - Playtime
Bally - Big Show
Bally - Sky Kings
Williams - Aqua-Gun - NOS - $300
Williams - Travel Time X 2
Gottleib - El Dorado - NOS - $450
Chicago Coin - Yankee Baseball - NOS - $300
Kasco - Clay Shoot - NOS - $300
Box A, loose - used, condition as noted - some NOS
Williams - World Cup 8 - Front - Rear - $250
Williams - Liberty Bell 9.5 - Front - Rear - $400
Williams - Liberty Bell 8.5 - Front - Rear - $300
Williams - Solids’n Stripes 7.5 - Front - Rear - $200
Chicago Coin - Champion Rifle Range 7 - Front - Rear
Chicago Coin - Twin Rifle - 8 - Front - Rear
Segasa DBA Sonic - Butterfly 9 - Front - Rear
Recel - Space Race 7 - Front - Rear
Sonic - Super Straight 9 - Front - Rear
Segasa DBA Sonic - Monaco 9.5 - Front - Rear
Segasa DBA Sonic - Monaco 9 - Front - Rear
Williams - Blackout 4 - Front - Rear
Box B, loose - used, condition as noted - some NOS
Williams - Klondike 7.5 (paint has crinkle lines) - Front - Rear - $150
Williams - Big Deal 5 - Front - Rear - $150
Williams - Klondike 9.5 - Front - Rear - $400
Williams - Klondike 9.5 - Front - Rear - $400
Williams - Jumpin’ Jacks 8 - Front - Rear - $300
Williams - 3 Jokers 8.5 - Front - Rear - $350
Williams - 3 Jokers 9 - Front - Rear - $400
Segasa DBA Sonic - Super Straight 9 - Front - Rear
Williams - Stellar Wars 9 - Front - Rear - $350
Unknown Submarine plastic game bezel - has 3-D effect.
Universal - videogame x3 9.5
Bally - Road Runner 10 - Front - Rear

Box C, loose - used, but in good or excellent condition - most look NOS
Williams - Spinout x 3
Gottlieb - Sky Jump
ChiCoin - Mini Baseball (NOS but chipped glass on edges) Front & Rear - $75
Gottlieb - Top Card
Gottlieb - King Kool
Gottlieb - Quick draw (22" X 26") - NOS Front & Rear - $400
Gott - El Dorado (NOS - paint bubbled!) Front & Rear - $150 (I am considering Triple Thick to fix this...)
Williams - Big Daddy
Gottlieb - Atlantis
Gottlieb - Big Brave (NOS - tiny scratches) Front, Rear, closeup of scratches - $300
Gott - Big Brave (NOS - but scratched - needs touchup!) Front & Rear - $150
Gottlieb - Jungle (4 - in bad shape) - $75
Gottlieb - World Champ (6 - flacking somewhat) Front & Rear - $150
Williams - Flash - used $250
Williams - Hyperball
Williams - Ambush (Gun)
Williams - Laser Ball
Recel - Lady Luck
United - Jumbo (bowler)
Exidy - Rip Cord (bezel)
Williams - Lucky Ace
Chicago Coin - Super Circus (Rifle)
Gottlieb - Top Card
Gottlieb - Pro Football
Recel - Butterfly x2
Williams - LUCKY ACE (used) - Front picture, rear picture
Midway SEA RAIDER (flaking) - Front picture, rear picture Note this is the middle glass, not the header!
Exidy - RIP CORD monitor plexi - $50 - , Front picture, rear picture
United - MAMBO (bowling/shuffle?) (NOS) plexi - Front picture
Recel - LADY LUCK used - Front picture, rear picture
Williams - LASER BALL (NOS) - Front picture, rear picture
Williams - HYPERBALL used - Front picture, rear picture
Williams - AMBUSH (rifle) - (NOS, but has tiny scratch) - Front picture, rear picture
Box D, loose - all are NOS
Sonic - Mars Trek x2
Crown - PERISCOPE (English EM game?) - Front - Rear
Recel - Lady Luck x2
Williams - Pheonix
Williams - Time Warp x2
Recel - Space Race
Recel - Icarus x8
Recel - Lady Luck x2
Williams - PHEONIX - used - Front picture, rear picture
Williams - TIME WARP - used - Front picture, rear picture
Williams - TIME WARP - also used - Front picture, rear picture
Box E, loose - all look NOS (no marks on edges for lift bar, artwork looks new, etc.) except for noted
Williams - Disco Fever
Williams - Space Odyssey x2
Bally - Bow and Arrow (used?)
Williams - Hot Tip EM (used?)
Williams - Super Star (NOS) Front, rear (22.5" X 25.5") 9.95 - $300 (one tiny chip in the glass at the bottom which the lift bar will cover)
Gottlieb - Spin Out
Gottlieb - Sky Jump
Chicago Coin - Speedway (Mark III) Plexiglass NOS - $150
Gottlieb - Soccer
Chicago Coin - Speedway (Mark III) Plexiglass (used) - $100
Gottlieb - King Pin
Gottlieb - Duo Tron
Some other glass in other areas of the shop:
Gottlieb - Hit 'N' Run (7)
Exhibit - Oasis (7)
Williams - 1962 World Series (6)
Atari - Kangaroo bezel
Stern - Strategy X c/t glass (6)
Midway - Galaga c/t glass (6)
Midway - Space Invaders Deluxe c/t glass (6)