When I think of box stores I don't tend to think of hurt, lost sales, or feeling sorry in general. They wouldn't do it if they didn't want to. It's their own fault.
I'm betting that people wouldn't think that way if they owned a store that took returns for no reason at all other than the buyer was done with it! I think I had that happen to me once on a saw I sold on ebay, buyer said saw wouldn't start after a month of having it and returning it to me all cleaned up. I'm thinking he just wanted to borrow a saw for a month, at my expense. By the way, the saw started on the third pull cold after I fueled it up.