Noooo, that is a big No, No !
Your account would get suspended if you release any contact details before the buyer buys.
A bidder winning the auction then can receive contact details. They do not proceed with a Paypal payment. They come, inspect the item and then pay cash if all is OK.
You see eBay charge their seller fee the second an item sells and not when the buyer pays you, so there would be nothing to enforce that buyer to later go home, and press that Buy it Now button, and in effect no fees paid to eBay for finding you a buyer.
