I've had two issues with buying incorrectly graded records on eBay, went through eBay on both and won - the eBay one gives the seller a day or two to respond so it wasn't immediate, but their responses in those cases were all "what are you talking about, it was in Mint condition when I sent it", I provided photos that clearly showed they were full of it, and they were over in a few days.
I don't know how it would work if you go directly through PayPal, even though the companies aren't technically the same anymore I think it may provide the buyer/seller with the same coverage/ he said/she said response time. With eBay though, one was so egregious that they cancelled the sellers account.
If buyer - Ebay. Fucks the seller 99% of the time regardless of evidence.
If seller - Paypal. They actually look at the evidence and will attempt to mediate disputes.
Transactions that happened outside of the Hardforum FS/FT community are off-topic, and threads started about them will be locked or deleted. Threads regarding eBay transactions that originated in the [H]ardForum eBay auction forum are permitted, non-forum related problems originating from the eBay website are not. Those posts are considered off-topic and will be closed or deleted.