When an item has a wide range of sold prices, and the highest prices are for items sold by sellers with no feedback, one should not necessarily assume that those transactions were successfully paid for, particularly if the items were relisted immediately.
eBay only collects a fee if money changes hands, and unpaid cancelled transactions do not result in feedback.
Such an outlier transaction could be a case of a new seller with unrealistic expectations, combined with a sport bidder or someone bidding out of spite, or it could be a fraudulent listing with a fraudulent "buyer" and that the deal was simply designed to convince other buyers that a common item is worth paying a lot for in order to try to it sell to others later.
