Man just like fishing you should of been here yesterday. Well maybe a few days ago anyway. Jbar was selling an Elite Energy 32 with a complete setup of top flight accessories for $550.
For $500 I would look on Archery Talk or ebay for a couple year old top manufacturer like Prime, Elite, Hoyt, Mathews. Their bows a couple years used will be better than any bow new for $500 or less.