I just got into bowhunting last year. Started out with a casual conversation with a friend whom is real big into archery. He called me up one day last spring and found a NIB 2008 model Bowtech off a message board. Between my friend's knowledge of bows and the reputation of this guy I bought it for less than half of new. I know you don't want to piece you bow together, but I found it to be half the fun and learned quite a bit about bows in the process. When all is said and done, I have about $500 for bow, sight, rest, stabilizer, arrows, shooting block, etc. in a pretty nice setup.
Now that I'm getting more into the sport and better at shooting, I'm already looking at upgrading arrows (went with decent ones since I figured I would lose a few) and maybe next year changing out my sight.
Good luck to a fun and addicting sport. I just about prefer to use my bow than a gun.