protip:
instead of purchasing P90x knockoffs for that much, invest in a DVD labeler and a good printer. do research to find one that will meet your needs. you can get el cheapos for a couple hundred, or decent/great quality ones for 1.5k and up. choose based on what kind of profit you plan to make and how long.
from there you can make your own. you can either buy a copy of P90x and rip it or download it, from that point on your inventory costs you pennies compared to what you would be getting them for.
this obviuosly works wonders for any dvd items you plan to sell using knockoffs. the only problem is you dont have a fancy packaging so youll have to sell "barely used"