I don’t understand which part of the “postage isn’t going to happen” he did not understand.
There was a thread here before about other item from ebay being sent abroad, the buyer then opened a dispute as apparently some items from the lot were damaged. Finally agreed on a discount.
Your item does not look too bad for packaging, probably a big box from a supermarket would do, some bubble wrap etc. The postage will probably be a killer depending on weight. I’ve sent a frameset to Portugal, it fetched £130 but postage cost was £40, the guy paid no problem.
It depends what is the second highest bid and if it’s from someone local to You. Should not be a problem imho as the description clearly states that item is collection only.