Quoted from ASOA:Buy some of the games that are less likely in players private collection and you will do well.
This is true at least for me and the group I play with. There are a lot of locations by us with mainly new Sterns and JJP games and a smattering of top 50 B/W games. While those are great, the places I find myself wanting to go to are places I can try games I haven't played a billion times (which are great and I still like them). A newer location just opened by us in a bowling alley and they put in a few new games (Deadpool, JJP Pirates, SW, GB) but also have LW3, Rocky and Bullwinkle, RTC, Maverick, DE Batman, and some system 11s like Diner, Rollergames, and Pinbot. I obviously can't speak to how they earn, but we've gone back a few times for a few hours each time just because it's something different we don't get a chance to play anywhere else.