While browsing flea markets and thrift stores for retro games has been fun and fruitful, you're still at the mercy of fate towards what you find. There's eBay but it comes at a higher price. GOG has plenty of DOS and early Windows games, some of which even include original ISOs to use on authentic hardware but does anyone know a way to search specifically for that? It's one thing to know what title you want to find it's another to want to browse, but I have no interest in all the AAA titles, indie, or otherwise more mordern titles. Browsing the ENTIRE library is an undertaking, so how can I filter or find a list of just the classic games?