Well, I can't say I blame you for raising an eyebrow, and in today's world it does seem we need to "see" the animal in some instances, but after reading your name "Mike Bell", it put me in a different frame of mind. Take Mark Bell for instance (hence your name - triggered this thought, LOL) I can almost promise the Bell's would not allow any possible customer to visit their facilty, nor do I think they would be able to take the time to meet you at the Airport to show you the animal. Not out of haste or poor customer service, but directly due to time. Now in no way am I saying this guy is "that busy", the Bell's have 30 employees in season and work around the clock to keep up, not to many breeders/sellers have that many employees (some don't even have that many snakes) but I just don't think that just because someone won't meet you at an airport to show you an animal doesn't make the "weird". Think of it from both sides of the coin...you want to see the animal (and for good reason - that's alot of money) he doesn't want to meet you with the animal/show his colection, you think the guy is bad news (very, very possible - and sadly w/ some of the horror stories I've heard, I would agree) but the other side could be like this...a guy has a Piebald for sale, someone calls him, says he'll fly up to see the animal. The guy says "private collection/no visitors (understandable for obvious reasons - residence, etc...) Then the guy says "we can meet at the airport" and the seller thinks "man, this stranger is going to fly cross country to meet me at the airport to look at my animal...could he be trouble??"
I'm guessing he couldn't provide you w/ pics...
Bottom line for me is if I was purchasing an animal of that value from a stranger I would also insist on seeing the animal as well (you're smart) and I would pass on the deal as well, but I still think the guy may be "legit" he might just be a little overly concerned about improbable possibilties.
Bottom line - if you're buying an animal of significant value, buy from someone you know will back the animal up 100% ie: BIG NAMES or lil' guys close by.
Just a quick thought...have you considered asking this person if he set's up at any expo's?? If so, maybe you could arrange your flight for then, and it could all be done in a public place under a business situation. I'm guessing he had a killer price on the animal or you wouldn't fly up to see it. am I right?? Well, either way I think you made the right decision - but in certain cases, not wanting to meet someone doesn't mean they're bad news all of the time...
just me being nosy again...best of luck on your Piebald purchase!!