A person who masturbates to pictures of used underwear auctions on ebay possibly because they cannot access any other internet porn or because they have a used underwear fetish.
"Pink silk panties size XX large, no reserve" -- Sounds like ebay wanker bait!
A person missing a few braincells who bids on an item before the last few minutes. Great for the seller not so great for the buyers including the EW themselves
"Hey Jeff you get that signed Star Wars trainset you were after in the end?"
"No the Ebay Wankers strikes back."