I don't get your point. Sure, you can get some money back for the DVD you are buying but there is less demand, you sell for a much lower price than the normal market price, the money you make reselling the DVDs, if you have any buyers at all, are much smaller than the price you spent on them in the first place, and you are spending 50+$ for 1 deck that is worth 70$ and cost 2$ to make and whose market price is diving.