I sell about 2000 legit DVD's a month on eBay and I've already had some issues with proving they are legit. I buy mine in bulk from people on CL and pawn shops and make about .25 cent in profit each. I only sell them to keep high feedback and protect my dsr's. Just a warning, they aren't worth much. If anything, and if you import pirated copies then you probably wont make a profit. If you make them yourselves, you are pretty much working for less than minimum wage.
Also, people are really quick to say "OMG, bootleg!" if they are slightly dissatisfied with your DVD's, and eBay takes that shit pretty seriously.