I kind of get it, it's a way for ebay to get more cash, well only a theory of mine, but they can't be such idiots as to not see it's unfair. They already got most of this marketso they don't care.
I suggest using another payment method than paypal (to avoid paypal fees), you're already a reputed seller so maybe you won't lose buyers. (DOn't blame me if it doesn't work, just thinking out loud here... :roll: ).