I got mine (still my first, I'm learning as well) from a pawn shop. At the time, it wasn't anything big, a 5 piece w/hi-hat cymbals and stand + a crash and stand and throne. It cost me a little over $550 total. I would suggest checking any pawn shop EXCEPT for the big chains, they wanted over $1K for just the drums, nothing else. I got a TJ Percussion, but I don't see that name much anymore, mostly TKO's that look okay... You may want to look into getting new heads for all of the drums, as that vastly improved the sound of mine. I like the clear pinstrips for the tops and a good thick one for the top, and a thin one for the bottom. I'm not professional, but I do like the sound from it, good and rock like. I would say if you can find a good **FULL** set (small tom, med. tom, floor tom, bass, and snare + hi-hat and at least one crash) for under $650, you should be good to go. Be sure and listen to it a little and see if you like it. If you don't want the pawn shop, then I would try this site:
http://www.musiciansfriend.com/ It's musician's friend, and they almost always have good deals for just about any thing. Hope this helps.