TGA didn't have many classics. I seem to recall a paperboy (broken) and maybe a bump and jump or dig dug. Maybe a burgertime. I don't really remember (they had like 3 classic cabs amongst a sea of imports). TGA was a pretty "niche" place, which may have contributed to their failure (combined with awful location and downright awful luck). They had a ton of import games: mostly candies and Bemani games. I'd love to go out to that auction, but it's a good 13+ hour drive for me. I did that once (to TGA even)...never again.
I don't know what turnout is going to be like, but that auction may be a chance to snag some truly rare stuff (probably lots of Bemani artwork) at rock bottom prices.