I'm glad you've had good luck with your Remington Viper but I honestly can't recommend them. They were discontinued some years ago by Remington when it was discovered a lot of them were plagued with reliability issues. I've had several come to me with these issues. The magazines are hard to find as well. It's my opinion that the op should stay away from the 522 Viper. There's too many good reliable rifles out there than to take a chance on a Viper model 522.
Well, you can go with a Marlin 795 semi-auto...costs around $129 or less.
They also have a $25 Manufacturer's rebate going on until Dec-31st, 2010, so that puts 'em in the $100 range
The 795 has a medium-weight tapered barrel, which tends to be a slight bit more precise than standard thin .22lr barrels. It is a heck of a bargain.
Or a nice used 25-series Marlin 25/25n/925/etc...usually $120 or less in pawn shops.
Same for the 80-series including the 880 SQ/980 Heavy Barrel rifles that put CZ's back on their haunches
Just about all of them have a 3/8" scope rail or D/T for rails/scope mounts, so you can slap a Center Point Scope or Red Dot for less than $75.
But for me, if you are gonna go .22 for varmints/small critters up to coyote size...might as well go .22 MAGNUM!!
A good Marlin 25MN or 980VS will outshoot any .22lr out there, and do it for low $$$ for the price of the rifle, even though the ammo is more expensive, plus it gives you out to 150 yards to blast something!!
I'm not just Trigger Happy, I'm Trigger Ecstatic!!