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Logic eludes some people. Price your part to cover what you want to get. If the price is too high it won't sell.

I won't even inquire about the part unless the price is right. If you say plus 3% for fees, it pisses some people off. It really is not that hard to figure out what it would cost to ship something anywhere in the lower 48 and not that difficult to figure anywhere else out either. Add that in too and come up with a price. Some things are not worth selling long distance because the fees and shipping cost more than they are worth.

And OH! If the deal goes south both buyer and seller loses shipping charges unless one of them is an asshole.