An online bidding war is taking place for a five-year-old Wispa bar. Student Rebecca Wells, from Stoke-on-Trent, found the out-of-date Cadbury bar down the back of a sofa.
She has put it up for auction on the eBay site to raise money for the charity LAM Action, which funds research into a fatal lung disease.
The Birmingham firm stopped making Wispa bars in 2003. It brought them back as a trial in October following an internet campaign.
So far bidding for the bar has reached 29 - at least 60 times its original asking price when it was sold.