Being "Down Under" I buy a lot of my gear from overseas and also trade a bit with eBay.
Occasionally somebody will "decline" to send something overseas even if all charges are prepaid, usually on the explanation that it is too time consuming to have to queue up to do a customs dec etc. Now I do them all the time, yet hey, it's their call so I guess I understand it.
Don't agree though. One seller once wanted to charge me an extra $15 to stand in the queue and post the stuff to Oz, and I agreed, but they still pulled out of the deal.
"We do not inherit the earth; we borrow it from our children."