Teh exporter does not pay brokerage fees.
Those are paid by the recipient.
You can stop worrying.
A few years back, eBay gave us some boilerplate we could add to our Descriptions that explained this to our customer.
Import duties, taxes and charges are not included in the item price or shipping charges. These charges are the buyer's responsibility. Please check with your country's customs office to determine what these additional costs will be prior to bidding/buying.
Also our US customers have an $800USD duty free allowance. If there is Internet (state) Sales Tax due, it was charged by eBay when the customer paid. This is a great help, but eBay does charge us their normal payment processing fee on the amount of the taxes, just as credit card companies do.