sean, in your case why not just use site like Ebay / Lelong / LYN to advertise your sale.

no transaction involve, the interested buyer goes to your place and pay you there and then as he / she collects the goods.

this way you save yourself from
1. being accused of over-charging for freight
2. opening door to possible accusation of freight damaged goods or you sent goods that are not in proper condition blablablabla