You'd be surprised the things some people can return. It depends on the store I think, and the managers on duty at the time. At the outlet I used to work for, they would take back obviously used bags.
Wow! Poor bag - I'm amazed that it had 31 people bidding on it and ended up near $300! Maybe it's just me, but I'd rather pay $100 more and get a new one instead of wasting that much on something that's so beat up!