OT: Negative Ebay Feedback Remedies???

[mdschulze]

I've been on Ebay for several years, primarily as a buyer, and have never had one negative feedback hit..... until today. Long story short, I sold a guy a putter, my posting stated that there was scuffing and damage to the head, the guy received the item, and immediately left me negative feedback for damage to the head! I would be more than happy to refund the guy and just let him him keep the damn putter but he won't answer my email. I checked Ebay's website and can't find an answer on how to dispute negative feedback as a seller. I know a lot of you do business on Ebay and was wondering if I have any options or am I just helpless? This guy with a positive feedback of (9) knocked me down to 98% positive instead of 100%. Also, once feedback is left, can it be changed by the buyer? Thanks, Mike