Flip it around. If I was a seller and some buyer wanted me to package for a courier they were arranging , and receive payment once they arrive I’d be simply selling it someone else as that all sounds scammy for me (not saying that’s the case here) . I’ve no issue posting items but it’s done using proper companies (RM/Parcelforce ) which I have control over and PayPal recognise.
Plus I’d not be sending some random person any personal details either.
Buying and selling is such a simple process. Don’t confuse it. By all means cover yourself by using a appropriate payment method but its unlikely someone is trying to scam you for £120.
