I bought one used/mint from KEH. Upon arrival, the rangefinder patch was unaligned vertically. Seemed to still focus well enough, and i enjoyed using the camera immensely. I returned the camera to KEH to fix calibrate the viewfinder, but when i after i received it, the batteries would drain when the camera was switched off. I sent it back to KEH to repair that issue, but they were unable to do anything about it. After quite a bit of time, during which, they weren't actually able to tell me where the camera was, they finally sent it to Tamron for repair. Again, a lot of time passed, and for whatever reason, i never saw that camera again. Even after a few months, they were unable to give me an ETA. They eventually refunded my original purchase price, but as much as i liked the camera, i was hesitant to try again with another one.
That said, if that's the camera you want, i wouldn't advise against buying one. It's nice to use and the results are all i could have asked for. But, i'd recommend buying from a store, and not a private individual - a warranty of some sort and return privileges would be important to me with this camera. Make sure it doesn't need ANY adjustments right off the bat.