You may also want to try purchasing online with one of the bigger electronic stores like Best Buy or circuitcity.com Consumer Electronics These are the two that I normally shop at, just a tip best buy is usually a little cheaper.
You know that crazy thing is that people are still buying 360's in the store to sell on ebay and they are still able to make a profit on them, nothing like at the beginning but still. I think that I would rather go to Wal-Mart and pay the regular price then get ripped off!
Well ebony, not everything sold on ebay is a complete waste, sometimes the product is slightly used but sometimes its new and in the box, but just make sure you read the detailed description and know what you are getting, just beware.
I shop ebay all the time! I have gotten some great deals and also have sold some things on there and made a good profit. It is all about supply and demand! I suggest that anyone purchasing on ebay read the feedback and see how the persons last few sales have went.
I agree with the previous poster, make sure you read the persond feedback, always, and I have sold a few items, but I do not really see one can make a living, but yeah, there are some gret stuff on ebay and really good deals.