I have after eBay bought Paypal. Ruled in my favor and credited my account with the full purchase price plus shipping. It was under $20, but I still got my money back.
I had to file a claim about 6 weeks ago, for 80 Gillette Mach 3 razor blades, that I hadn't received, as the 30 day window was running out. I had emailed the seller several times, without any response, prior to filing.
Within 2 days the seller was in touch with me, and told me a story of how he had a fire in which he lost most of his merchandise and records. He also claimed he had just got out of the hospital, and that was why my emails had gone unanswered.
A day later Paypal contacted me, telling me that the seller had forwarded a UPS tracking number to Paypal, in answer to their inquiries about my claim. The same day, the seller emailed the same tracking number to me.
3 days later I got my razor blades, and the seller had thrown in an additional 8 pack for free.
I contacted Paypal and went through their procedure to cancel my complaint.