@verash I also have same concerns like you, i sell my item on ebay.com, i pay $0.50 insertion fee, then 15% hefty selling commission then substantial amount to Paypal for then Paypal transfer these money to my account at much lower exchange rate than current market rate.
Again fear for negative feedback if they don't like your item, all in all we live in anxiety and fear, and mostly buyer don't bother to left us feedback, because of this many future buyer don't get clear idea that how honest we are.
I think ebay must do something so that other know it clearly that how many successful transaction we have completed.
I remember i dialogue from Movie Dabbang,
Makkhi: "Chedi tumne mera istemal kiya hai".
Chedi: "Arre!! Humne thode hi kaha tha ki aao aur istemal ho jao, tum khud hi aaye the istemal hone".
I think i am "Makhi" and Ebay is "Chedi"