CheckFree is running a "50/50 Promotion" for eBay sellers through the end of the year. Sellers who complete 50 CheckFree payment transactions in a calendar month will receive $50 in cash from the company. Each transaction must be over $20, and one buyer can not represent more than five transactions.

CheckFree, which offers electronic billing and payment services, announced the service for eBay users in June. The service allows buyers to settle eBay purchases directly from their checking or money market accounts. eBay sellers can search for their closed auctions and send an invoice by highlighting the appropriate auction.

http://www.checkfree.com/auctionpayments