I have never had such strange experiences as I had when I went through my cragislist ad posting phase. There was a time when I didn't have many Macs, and that certainly fixed that problem. Posting an ad to craigslist is a guaranteed way to get an old Mac for free within a week or two. When people have individual Macs for you, they're mostly PPC Macs. Lots of 6100s and 6200/6300s in the Performa variety. LOTS of old original iMacs. Where you'll find 68ks is when you stumble upon a hoard of old Macs. I got a pickup truck load of IIsi, LCs, and even a IIci and a Quadra 700 from some guy's shed in a trailer park. Even a couple of Lacie Apple logo external hard drives. They're out there for free if you want them and don't mind visiting other people's worlds. I have had enough of it myself, though. The only case styles missing are Quadra 800, 900, Power Mac 4400, and color classic.