http://www.ebay.com/itm/351399266224
^This one was probably worth $480. I believe there are only 2 older known ones. One sold for $1800 some years ago and the other is in possession of Webwit.
Well, that's an Industrial, Dork... I don't think it could be considered in the same category with a 1393464.
OK Fine. A WANG version of this board would easily be worth $480, it's not an SSK. It's not industrial. it is, however quite rare. All were supposed to have been destroyed. I only know of two or three that exist.
No doubt. But again, the WANG has a unique molded logo; whereas if you really wanted a set of airline key caps, you could have one made for a lot less than that.
There are rare model Ms that are beige and have tenkeys. Another example is the first "enhanced" keyboard that came out in mid-1985. Early examples of the the 1386303 have sold for that kind of money...
Do you mean NIB, though? Remember, this one is just (apparently) unused. The seller also told me 10 plastic tabs had broken off—I forgot to mention that. (He wondered if he should keep them with the KB in case they had collectable value!)
While the buckling spring over membrane design was introduced in Q4 of 1984 on the first-gen wheelwriters (and potentially earlier but I have yet to find conclusive proof) and showed up almost immediately afterward in the 122-key variant, the first keyboard in the timeless "enhanced" keyboard layout was the 1386303, and the first "PC compatible" version was the 1388032. Both examples sell for much more than other model Ms.
Well, even though that doesn't actually apply to the airline board, it's good to know!
Rare keycaps absolutely command a price premium. Look at original IBM APL sets. Even the Variant for word processing gets some high prices... And there are others as well. I'm a particular fan of the GE Marquette input terminal keycaps (recently sold to a friend) and those boards aren't common...
I wonder what kind of actual premiums, though? In the $100's?
BTW, I noticed a complete Marquette board
sold on eBay a few days ago for $35. That would've been a good deal for any Model M in good shape! :?O