Maybe I am slow but it took me a while to stumble onto this one.
I though I would share it encase anyone else is as slow as I.
If you pay you Ebay fees via credit card, you are charged the credit card exchange rate.
If you make a onetime payment from your Paypal account each month you are charged the Paypal exchange rate; considerably lower.
If your fees are in excess of $1000, this could save you over $100 a month.