^probably KEH.com?
Anyways... Some cool rangefinders that AREN'T as expensive as a Leica... These are some of the ones I've used, and enjoy a ton.
Olympus XA
Rollei 35
Minolta Hi-Matic 7Sii
Ricoh 500G
Canon Canonet
Canon 7
Konica C35/Vivitar C35
Olympus 35SP
Minolta CLE (Pretty much a Leica, that Leica was too snobbish to sell, because it was killing the sales of it's M5 camera - the worst Leica model. It takes Leica lenses, and even though it's plastic and everything, it's my choice for the best rangefinder out there for under 1000$... You can find them for around 600-700 very easily. Maybe you'll find one as low as 400-500 if you really look hard. They're amazing.)
Then, if you want some russianmade Leica knockoff rangefinders, check out the Zorki's. They aren't as sharp or anything, but they are still pretty cool, and damn cheap.