Been there. I've made a few extended trips to buy a pin that went bust. I'd go so far as to say that I have not bought a single pin more than a couple of years old that lived up to the seller's hype. I usually factor in spending another 20% to get the pin into the kind of shape I can live with. It's amazing what some people will offer as being in "great" or "collector quality" condition.
For much the same reason, I really dislike selling to anyone who isn't from this area. I want the buyer to see the pin in person so they aren't disappointed. That has cost me a lot of money at times, but I want to make sure that people know what they're getting.