I have an item up for auction. I am daily receiving an offer from the same bidder. I have politely declined bidders offers and I sent a counter offer that I would accept. Bidder daily sends an offer lower than their original offer that I declined. What recourse do I have for such a game player. Thanks

If you don't want to do business with that person add their eBay ID to your Blocked Bidders List. Another solution would be to list as Fixed Price with immediate payment required and no Best Offer.