It's not crazy. It is just expensive.
If you put Calculated Shipping in your listing, your customer can see how much it will cost him to receive his purchase. Maybe it is worth it to him, maybe not.
If he bid, and won, without asking for the cost of shipping, you are allowed to charge whatever a reasonable price would be for the secure arrival of the item. If it is too high for him, you have two choices.
Mutual Cancellation for calm sensible customers is fast and ends the transaction for both of you. You get your selling fees back quickly. Both of you can leave feedback, so don't use this if the customer is hostile.
Unpaid Item Disputes take 4 days to open and 4 more days to close. If the customer does not pay, he gets a Strike and you get your fees back. No feedback can be left, so this is the choice when you have an angry or strange customer.
But it would cost about the same to ship to Russia, to Germany or to Australia. And the chances of problems are no greater to any of them than to Manitoba or California.