I read all the things and for this you want the buyer to send the payment first so you can make the payment to the seller and you take 2% comission . ? i bet no one will do that , if you can use escrow , also we have to pay shipping fees?
Paying shipping doesn't seem absurd. You'd have to pay snyways, breaking it out separately makes it easier to make an apples to apples comparison. Now, as to the fitness of service, that's a whole other question