I'd rather take my chances with eBay purchases I can at least follow up on if there's a problem... than buy at a hamfest. Yes hamfest prices are over inflated as are some of the sales pitches. You know
d@mn well some of those hamfest goats are selling items that will only follow them back home, but once a person looks at it for more than 20 seconds, they up the price to $75 on the chance they can get $40 for something they were willing to settle for $5. Capitalism at its best!
But to me, the truly disturbing part of hamfests are the dirty, grubby looking geeks. Some of them have seriously, nasty personal hygiene and it gives electronics/radio enthusiasts a bad image in the eyes of the normal public. We've all seen them there... the baggy MC Hammer pants, oily, stringy hair, the stench of body odor, etc. And only the dorkiest of dorkster ham operators wears a ball cap with his call sign in felt letters on it just above the solar powered cooling fan mounted on the brim! WTF is up with that? These are the cloistered, social misfits that could easily explain to you of the valence shell of silicon doped junction in a 2N3055 Xistor.
As for the new parts vendors, who the hell is buying those silly flashing LED bicycle safety lights or the cheapo laser pointers? How about those real cheesy clip-leads that fail after 1 week's use? It just gets worse from there.
How many hacked and whacked 2-way radios (mainly CBs) have we seen there with price tags in the hundred$? Frickin holes drilled in front panels for controls that look out of place. Then there's always a Tram D201 sitting on a table or under one, that's been turned into a tragic abortion. Or the used, modded Galaxy Saturn or Ranger base priced at just $50 less than new price personally owned and attested by the King Mud-duck himself!!
I actually enjoy and respect the older gent or lady who has a small card table set up with a few well-cared for items, priced reasonable, and willing to negotiate a fair price. Those kinds of sellers are the real staple behind hamfests.