It's unfortunate that some people try to make a killing instead of just a living. I hope some karma is in the cards as I'm pretty sure he bought up the very last Keeler lock cylinders from Vintage Airstream supply.
The original posting is here.
Airstream Keeler Brass Company KBC Lock Key Cylinder Plug Trailer RV Door Latch | eBay
This is the response I sent with the link to Vintage.
I do agree you have a rare lock cylinder and I just bought a spare Keeler lock set myself for $275.00, but that was for the entire lock set. I did have to replace my lock cylinder in my original lock set last year for $50.00 by a locksmith but I am always looking for spares; however your pricing is extreme. Vintage did have NOS cylinders for sale a while back but unfortunately I didn't see the sale but would be willing to pay what Vintage was asking for the cylinder. I have included the link.
NOS New Old Stock Keeler Cylinder
Here's the reply I got back. Note he states that the money offered is what he has into the lock cylinders.
I appreciate your offer. The complete lock you got now sells for $875.00 new and $575.00 used and that is if you can find one , I saw one on ebay sell 6 moths ago for $899.99 . That is the reality of supply and demand on these vintage parts. What you are offering is what I have into them so that does not work . I don't expect to get anymore and several customers have been more than pleased just to be able to get their hands on one . I appreciate the communication , I can work with you on shipping to Canada if you want to go first class international but that s the best I can do . Thank you
I know he will sell them eventually....but not to me, not at that price.