I use an Ibanez Sound Tank 60s Fuzz (FZ5). They were inexpensive when they came out. I picked up a new one for $25 back then. Like everything old or discontinued (except me) the have become "collector's items" on eBay. I really like the sound of the pedal, despite the plastic housing. You can get a real convincing mid-sixties "back from the grave" style fuzz sound.
Crank it through a fender tube amp with tremolo, you'll get a way cool pre-summer of love (i.e. pre-hippy) psychedelic sound.