They have a fee and OP is trying to make some extra funds during the transaction.
Yes, unfortunately skrill is revisible payment method for transaction, it is high risk to charge back
if the op is not becareful to buyers, he will be losing his bitcoin.
i think the op should use escrow for this transaction selling and it will protect from the scamers
on bitcointalk, many scamers that use skrill on here.
Even after escrow is used, if the person who want to chargeback wants to do, he can still do that. It is always risk accepting payments from others, since they are reversible.