The only paypal dispute I have had as a seller was for a clothing item.

Buyer had left pos feedback after receiving item, then a week later told me she was unhappy as the item was stained.

She returned it very obviously stained and bleached to try and remove what appeared to be red wine.

When I attempted to discuss with her she filed a paypal dispute.

I could of course been dishonest and claimed not to have received the item back.

Despite sending paypal invoice copies etc and speaking with them and emailing they still refunded the buyer in full.

But following advice from here I contacted the financial ombudsmen straight away, then rang paypal and gave them the info re my complaint again and my money was refunded immediately.

Buyer got away with it though !!