I'm looking to start purchasing some broken guns, much like you may from a Boneyard on a major retailer's site. However I like to have some clue as to what I'm fixing, sure it's fun to try and self diagnose, but really when you only have limited free time to do, sometimes I find it much easier to just slap a sticky note on the pistol grip, and decide what I want to frustrate myself with that night.
My budget will range usually from $300+ depending of course on my work schedule, and what's offered. If someone happens to offer up 5 WE, KWA, or TM glocks with an issue for $60 each, I'll probably take that over a single $300 M4.
None the less, feel free to offer up what you have, I should have cash early to mid-December, perhaps even earlier depending on how things go. I'm taking anything and everything, I prefer to have an issue diagnosed, but I have no problem trying to figure it out. Just don't doubt you may see it end up right back here later on, unless I love it too much to get rid of it!