I lost $1k due to Paypal 'unauthorized charge' reversal.  I showed 10 lines of evidence (10 attachments) for every transaction and lost every single dispute.

I contacted 8 other sellers based on ebay feedback and all 8 confirmed the same story from the same buyer.  Yet Paypal still won't support the seller's.  We all got screwed.  Stay away from Paypal and Ebay.  It's a total nightmare, and even getting your ebay seller fees returned is a nightmare because when they Buy it Now with Paypal it's marked as a paid auction.  

That was just one buyer.  I have a few other disputes pending from other fraudulent buyers.  Lesson learned.  Avoid ebay/paypal at all costs.  To think I've been a fan and avid user since the beginning... just didn't realize how bad it was as a SELLER.