Two days after the bidding opened, Federer's racket was easily the most sought after, with the latest of 87 bids offering $13,300. The next most-wanted racket is Rafael Nadal's, with a current bid of $4,150.
The eBay auction, which opened on Tuesday and closes after the men's final on Sunday, follows "Hit for Haiti" – a charity match initiated by Federer on the eve of the tournament.