prob becuz someone paid 5x the real price of the cap, and it's pretty easy to scam on ebay
People pay pretty high prices for these anyway all it takes is someone who is new and has a lot of disposable income to push the price through the roof.
Dont most scams on ebay involve taking photos of an identical item that has been damaged and getting a forced refund (usually common electronics). Or send fake paypal notifications to get a seller to ship before payment has been sent. Say the person was a scammer, what would their next move be? Is the seller covered? I mean i doubt the person has a spare broken clack to take photos of to ask for repayment.
Is the address for the buyers ebay account the same as paypal and can you look the name up on any electronic database like a phone directory to confirm residence?
Has the seller looked up the name on facebook etc to see if any details like location match. Little thiings like this might provide peace of mind.
Did you send out the package so it requires a signiture for delivery? If so it starts to get difficult to claim the package was lost