The quote below is from an eBay auction. Is the seller allowed to do this?

"*** BEFORE YOU BID!!! IF YOU HAVE ZERO (0) FEEDBACK, YOUR BID WILL NOT BE ACCEPTED WITHOUT YOU PROVIDING YOUR NAME AND A LISTED PHONE #. FAILURE TO PROVIDE THIS INFORMATION WILL RESULT IN ALL BIDS CANCELLED AND NOTIFICATION OF RULES VIOLATION TO EBAY. IF YOUR FEEDBACK IS BELOW 0, YOUR BID WILL BE CANCELLED IMMEDIATELY.***"