If I were eBay I'd be much more concerned about improving the service I provide to my customers -- those millions of buyers. I think over the last few years the auction service has lost its focus. It's forgotten that its real customers are not the dealers who sell stuff, they're the people who buy stuff. eBay has worked to improve services for sellers, but the eBay interface for buyers has, if anything, deteriorated.
Screens that once focused on the item for sale are now a visual chaos of cross-promotion for "eBay Stores" and "Seller's Other Great Items."
Search hasn't been functionally improved in years, and there is still no permanent way to keep track of what you've bought, who you bought it from, and how much you paid for it.
Google's Gmail has shown that effective, efficient search can be an interface to data all by itself -- and that it's possible to manage a LOT of customer data economically -- 2573MB per customer, to be precise.
That's where eBay should spend a few bucks. Not on becoming a business for the 1970s, but on reinventing its business -- its core business, its value to customers -- for the 2010s.