I have to agree with Oneeyedvic. I used to work for a company that supplied DVD's/CD's/Games etc.
I was made redundant last year because my employer basically wasn't making any money. We bought goods from the wholesaler and added a markup before selling them on. Obviously people could get the stuff direct from the same wholesaler without our markup and so went direct to them. Amazon and Play were also cheaper, often with next day delivery.
Add to that the fact that more and more people are downloading films and buying illegal copies for less than a fiver, I doubt there is any money to be made in this business.