You might check into eBay's live help option and ask about it. http://us.ebayobjects.com/2c;27244793;12515765;n
I don't know ebay's policy on the time period for relisting an unpaid item, but I'll bet it's at least a week
Its extremely strange as I usually pay within 3-4 days and everyone leave feedback saying fast payment etc etc. Plus the only time I see time limits they usually state one week limits.
I am wondering if this person wasnt happy with the price and wanted more money?????