isn't this kind of think ebay's inherant problem.. I believe the current version is to sell New unopend boxes of things like Lego for 75% retail and then when the auction ends just order the goods on a stolen card direct from the manufacturer at 100% retail for direct delivery to the buyer. The ebay seller does a runner with the cash and the buyer gets the 'new' goods direct from the manufacturer, ehich should set alarm bells ringing. however most leave good feedback for the 'new' goods, and a short while later plod knocks on the 'buyers' door and they get a free 'new' set of braclets for using stolen cards...
The sooner the banks integrate card usage with a seperate authorisation process the better. perhaps via email on a mobile app. [your card has been used here, click to authorise.]
if not authorised by the end of the day an dispatched parcels are stopped.