The role of a wholesale DVD distributor is to license the distribution rights of the DVDs from the studios which make the films. These DVDs can then be sold to online companies, retailers and DVD rental businesses. Occasionally, a wholesaler will cut out the middleman and make the DVDs on their own site.
Today, there're a lot of wholesale profits to be made from selling to either retailers who own high street shops or DVD rental companies.
Also, mail order DVDs have become much more popular and widespread. Online, many people have realized the money that can be made through DVDs. Hence, eBay suppliers tend to buy in bulk and then sell them...