Dr. Frodo DEHKORDI eBay Sellers beware League City Texas

I recently listed a collection of photography equipment for sale on eBay. I clearly listed it "Lot Sold As-Is" and clearly stated that "I am not a photographer so I will list what I can, but the photos are a more accurate representation of what's for sale". I was emailed by "Dr. Frodo Dehkordi", who, as evidenced by his email, was aware he was buying the lot "as-is" and even used that fact to negotiate a lower price:
"Dear xxxxx,
Your price is reasonable even now.  But the problem is your items are not inspected or tested.  So, I took the safe side to take care of any unexpected
none-working items... I'll place my $xxx.xx offer (including your Canon AE-1 with lens), Just for Today.  If it works, let me know.
Thanks anyway."

Once he got the package he claimed my "as-is" items were not as described because the Canon AE-1 didn't work properly. Mr. Dehkordi only disputed one camera of the many cameras and equipment which I sold him was not as described. An identical Canon AE-1 was recently sold on eBay (#131109121424) for $29, which is less than 1/7 of the total value of what he paid for. I even offered him a $30 refund for the supposedly non-working camera but he refused.
He opened a grievance case with eBay and eBay somehow ruled in his favor and forced me to give a full refund. I've since found multiple websites full of eBay complaints where they sided with the buyer even when they shouldn't have. Beware of shady eBay buyers!!!