i just started getting into the air gun thing. All i have now is a cheap spring-piston pistol and a cheap Daisy 880. cost 40 dollars at walmart.
it's pretty damn accurate. from about 25-30 feet away, i can hit a quarter size target with relative ease. I just bought a cheap scope and mounted it on there, so my groupings are improving.
I found pellets to be more accurate than bbs, but you have to load pellets in the daisy guns one at a time. BBs you can load a crapload, like 50. pellets are cheap too, just bought a tin of 500 for $3.50
safety should be a big concern. wear eye protection, and always be sure of your backstop, eg , don't shoot into a cardboard box that's on a cheapbookcase with a thin backing like i did.
You will end up with a hole in the wall like me
you should look at some airgun sites that are out there. alot of these folks are real hardcore so you probably won't have a clue as to what they're discussin at first.
A airgun bbs based in the UK
some general airgun info
hope this helps.
-patchy