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Its against Paypal rules to accept a family / friends payment for selling goods and you risk your Paypal account being limited if you do so.
A buyer would not be able to open a Paypal dispute for non-receipt of item OR item not as described as they would have no Paypal buyer protection. However they can still open a dispute for an unauthorised transaction OR do a chargeback (via their card issuer) and you may well lose as you would have no Paypal seller protection.
Secondly fees are no longer returned when you issue a refund so you have probably lost more money than if you had complied by paypal rules and accepted a goods/services payment in the first place.
Advice is voluntary. Kudos / Solution appreciated.