I've been wondering this for a while now. Which is more worth while when building a collection for a system? Saving up the cash and buying the must have expensive/ rares first or filling in the good games/ more common titles first? For my Game Boy collection, I'm been building it up by checking bargain bins at the game shops. But I'll be working on my Saturn library as well, and some of the games out there are pretty spendy, but fit right into my gaming tastes, like Panzer Dragoon Saga, Shining Force III, Dragon Force, etc. I almost feel like to get the most out of the system, I should be slowly going for the must-haves first and then looking for the filler later.
Suggestions?