This might be relevant: http://blogs.dlapiper.com/mediaandsport/germany-german-federal-high-court-rules-on-two-ebay-offer-listing-cases/
(german) http://www.heise.de/newsticker/meldung/Urteil-zu-abgebrochener-Ebay-Versteigerung-Ein-Auto-fuer-einen-Euro-2453014.html
TL;DR: someone put a car on ebay but then sold it locally for 4200€. At this point someone had already bid 1€ on the auction. Seller canceled the auction and subsequently got sued by the bidder. Bidder won and got 5249€ (value of the car minus 1€).