[racingdwarf]

I can understand why you sent it mate, if money has cleared and the item is shown as immediate dispatch with the sad no life people out there you can get negative feedback at the drop of a hat and once you have negative feedback people see it no matter how stupid the reason is. If your not really clued up on ebay and paypal it's an easy mistake to make, I would and so would many others, thats the thing most scammers use, trust

The thing that would ring alarm bells with me is why with paypal you would send £90 in 9payments for a £75 item, I don't get it, you can send exact amounts with paypal. I wonder if the £90 was coming from one place (maybe stolen account details, card etc), and the refund was going to another, thus making him £90 cash in an account + he now has your engine Also there is nothing to correspond the payments to the engine,Did he pay with the invoice?

He could also be saying the item is faulty as an excuse should ebay paypal put pressure on him, which I doubt they will