Check out the Crosman 1377 pump pellet pistol. Very accurate, fun to shoot, and you can pimp them WAAAAYYYYY out. (Steve N)
It's a tank--and will feed bb's/pellets/ and (not recomended as they may hurt the bore) darts. Third-generation of a model that has been around for decades and is a great value. Varriable power pneumatic, single shot. I had one as a kid and found one last year at a garage sale for 20 bucks--I have been VERY happy shooting it off my deck. I'm no pistolero by any means, but my main 'target' is an old #10 can lid nailed to fence post that I can ping about 60% on a good day--at 75 ft;
That 's NOT bad for a plain-jane .177 pellet gun. With a max velocity of about 700 fps, it can be used for small critter control also if needed, or could be used indoors with a pellet trap and fewer 'pumps'.
For the money, a best buy in my book. The only one I like better is a Benjamin (now made by Crossman also, but pellet only) and cheaperthandirt.com lists both. The Benjamin has a little less power, and costs twice as much, but is even MORE solid and refined; when I was younger I would shoot pennies balanced on edge at 33 ft. Both are American made as well. As mainmech48 points out below, the bore *IS* brass though--no steel darts or BB's (you COULD load lead bb's if you wanted).