I honestly don't know of any good, inexpensive .22 revolvers. You would be very well served indeed if you could come up with a Smith & Wesson K22 or Model 17 that is finish-worn but mechanically good. Those will likely run at least $250. Add $100 to $150 with a good finish. (If you consider 4" barrels as well as 6", your possibilities are expanded to the kit guns, model 18's, and the like. For plinking, you will be fine with a 4" barrel. I like my 6" K-frames, but I have put a bunch of squirrels in the pot with a 4" model 63.) If you really don't want to spend that kind of money, I would think that you might be better served with a semi-auto. You can often find a Ruger auto for less than $200. Sometimes for a lot less.
Good luck, and let us know how you fare!
Clemson