It is not a good idea to get into video game retail.
This is something to serious consider
Another thing is that Game Stop is put the stranglehold on the market, it is make it very tough to be successful and profitable.
I had worked in video game retail in the older days and a few years ago had considered a venture in video game retail and rental but the whole revolution of things like Ipod, on demand cable, XBLA and Virtual Console have made me realize that it would not be profitable.
Before long, you will start to see alot of these Game Stop stores closing up as well as alot of Best Buys and the like. They are not go out of business but today they are have many store fronts and will have to reduce and cut back to remain profitable. Many of the small ones will likely have to shut down all together. Niche shops that have been around can survive and continue to fill that niche but a new niche shop may not survive for long and be profitable.