i agree !!!!You entered into a contract to sell the bags to the highest bidder. Now is not the time to decide you made a mistake. Not only will you get neg feedback, but I bet ebay suspends you. We have all made errors similar to that and have lost money. Why didnt you just return the bags in the first place? If you return the bags you will be out listing and final value fees as well.
if i was the winner i would be very upset...you shouldn't have put something up if you were not sure...you will def get a neg and get suspended