Hi DrKain, and welcome to the forums!
If a buyer wins a claim on PayPal, the entire amount of the original transaction is what will be granted back. If the cost of shipping is included in the original transaction, it will be refunded. If a seller tries to renegotiate a price after you've paid, or charge you more for shipping, you can ask the seller to refund the first transaction and let you pay in a second transaction. That way your protection will extend to the full amount.
I hope this helps!
Olivia
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