How do you buy DVDs wholesale?

I recently made a decent bit of money selling some of my old DVDs on eBay, and I figure that with an investment of a few thousand bucks, I could buy new DVDs and hawk them on eBay with a minimum of expense. (I would set up a small business since a significant amount of money would be involved; I’m already familiar with the processes involved in that.)

But I can’t seem to figure out how you go about buying DVDs wholesale from the distributors (or whomever.) I have been googling all weekend in vain. All I can find is websites of questionable legitimacy offering to sell direct-to-video schlock and porn. I’m looking for good movies released by the big studios that people actually want to buy.

Surely some dopers have worked in a video store and are familiar with da bidness.