"RWS model 34 for $134. Anyone had any experience with this model? I have been using a 22 rifle with Aguila's Colibri rounds, but want to switch to something more stealthy and accurate".
I know that rifle pretty well. You didn't mention which caliber, did you?
In any case, you usually have more stealth advantage with an airgun, right? I say "usually", because I don't know that particular Aguila round. They make a wide variety of RF ammo, so if the Colibri is a CB short, it is also very quiet. Anything louder than a CB will typically be louder than the 34.
As far as accuracy, assuming it wasn't horribly abused by any previous owner, yes, it's very good once you find the pellet it favors, and make sure the 3 main stock screws are snug. Ammo testing (for accuracy) is familiar territory to rimfire owners.
(Also) Assuming you're using a scope, the 34 demands more durability from a scope than the RF does. But you can buy the Bushnell Banner 4-12 x 40 AO (71-4124) for $79 plus shipping on the Net. It typically holds up well on spring guns like the RWS 34, and it has nice optics. As a matter of fact, it also makes a nice RF scope.
The price sounds OK if it's in reasonable shape, and it functions correctly. If it's a used gun: If you took a few pellets of the correct caliber with you, I wonder if the shop owner would let you cock and fire it once or twice? Some will, if they have a back stop, etc. Those few shots can tell you a lot in a hurry. If it's used and he won't let you try it, you're buying a pig in a poke. Now, if it's new, that's a pretty good price.
HTH,
Ed