[tonyo]

My theory:

They would like to sell, but don't need to sell and thus aren't in a hurry. They shrug their shoulders and say "I can list for free so why not try it at a higher price for a week to see what happens?" It may be that the person who would pay more just didn't see it last week, or the random ebay surfer sees it this week, likes it, bids on it or buys it without checking completed listings or comparables. That's probably what the seller is hoping for.....? Like a game of roulette.