First let me post this link that I found on Pinside. They have a ton of really cool signs for gamerooms. The neons are kind of small, but cool none the less!
http://www.backtothearcade.com/Direct link to signs:
http://www.backtothearcade.com/index.php/categories/game-room-neonsI have been looking for a neon since before Spencer screwed me by selling a nice as heck "Pinball" neon to some unknown person at the SPF show.

I have been using a Craigslist app for the last year to find a neon sign for my gameroom. 99.9% of what is for sale seems to be beer related. Mostly Bud/Coors/Lite etc. I hate beer and have not had one ounce in at least 25 years. I have been looking for something to do with Tequila, wine, or gameroom related. Recently I came across two really nice neons on CL Orlando that I bought. The big one from 5 Rivers winery is huge compared to the ones on the above site and has a backlit panel. It had to have been $500+ when it was new. It also came with a dimmable transformer, which I have found is very important. Most bigger neon signs are very bright when you put them in your house. Too bright to be over or near a pinball machine. I have retrofitted the smaller sign with a dimmer too. Dimming a neon is easier said than done. The new neons have electronic power supplies that simply cannot be dimmed like the old-school transformers could. You have to actually replace the transformer with one that contains a dimmer.
The guy I bought the "Cocktails" neon from has dozens of neons at his house in Winter Garden and repairs them himself. He has been a great help to me on the dimming subject and is also looking to buy his first pinball machine soon coincidentally.
John