Second the Buffalo's comment. Dirty ammo that, in the few rifles I used, also is not very consistent. Not worth buying at all.
For cheap ammo, I would recommend you go with Walmart/ Federal.
Craigslist is also an option, and you may have the option of shooting it before buying. If you're looking in the lower (< $ 400 ) range, new will get you a warranty, and the bow will have new strings.
If you're planning on going to the Great American Outdoor Show, you can shoot several...