I've become a huge fan of finding good deals in plain sight. What this means is finding game stores or places that sell used games slipping on their prices. I've always done this, but I do it even more now since everyone and their mom hits up all the typical "good deal" places like thrift stores, flea markets, and pawn shops, which have all jacked their prices through the roof on retro games anyways. I've found some insane deals which even if it's not something I'm specifically after I'll just sell it and use that money to buy what I really want. For example, I found a copy of Samurai Western at a local used media shop in pretty much like new condition for only $10. Resold it on ebay for $180 and then used the money to buy mods and things I wanted for the PS1. And I'm only out $10 + ebay fees on everything! Unfortunately this is not nearly as easy to do as it once was, but I'm still surprised what I can find at these types of stores.