It's really none of my business, but I can sure say to Circle Burner "Been there, done that". I've sold quite a few complete airplanes on eBay, primarily listed for local pickup only, and it never ceases to amaze me how many Bidders think my time is of no consequence and reimbursement for materials only is more than adequate. In fact many don't think they should share in those costs at all!
Trust me, it takes considerable time and effort. And, if the item is damaged in shipment ... well, does anyone here know of a carrier that won't first assign blame to the shipper for faulty packaging?
And then there is the "sale" I made on eBay where - after I'd invested considerable time and more than $20 in materials - eBay allowed the "Buyer" to back out of the "Sale". Golly gee whiz, don't get me started ...
Speaking strictly as an outsider here: seems to me John posted the ad, clearly stated his terms, and has every right to expect his wishes will be respected. I don't blame him one darn bit.