I own a sheridan blue streak, it's over twenty years old now and needing a rebuild kit thats less than $20 but still able to kill rabbits and tree rats. I have taken larger game with it in the past up to and including coyotes. The one I have is .20 caliber, but I think Benjermin makes it in .177 and .22 caliber now. I would suggest one of those insead of .20 because I sometimes have trouble finding ammo for it.
_________________________
Depend on yourself, help those who are not able, and teach those that are.