>Is that really an advantage? Fulfilment is always handled by a lot of places for the big e-retailers for returns, which is similar to what eBay needs for sellers.

I think the advantage is going to be "bring your junk to GameStop and an employee will put it up for sale and handle shipping"

You'd get considerably more trust buying something on ebay that at least some teenager looked at and verified was real and powered on, etc.