Unwanted present returns trading

Let's say someone gives me a Christmas present I really don't want - the "Men Are From Mars; Women Are From Venus Board Game", for example. Depending on who gave it to me, I may not be able to say "This is crap, have you still got the receipt?". However, there is probably someone out there who has bought this for themselves or for someone else, knowing that they will love it. This idea is for some kind of auction site, or an eBay category, in which receipts for items or the ability to return items can be auctioned. You might, for example, pay 5% of the purchase price for the ability to return an item and get a full refund.

This would work very well for returning stuff to sites like Amazon, which allows the original purchaser to generate return labels based on their original order. This return label could then be emailed to you - the person buying the 'return service' - who would send off the item to Amazon. The refund would get sent from Amazon to the original purchaser, who would then send it (minus 5%) via PayPal to you.