I know you can buy secondhand EE from ebay or other places, but this is not the street price which we're discussing here.
Any gadget will be cheaper when bought secondhand. The longer and better you look around, the better the price. Of course.
That's how I bought my Dell Latitude 2100 with touchscreen with a 50% discount and a 3 year Next Business Day warranty. Still it's not something that you can do in a shop.