Gorgeous keys, but are they really worth over $250? Not to be ungrateful for the post or anything, but it's very unlikely the board you'd be using them on would be worth that much. Wouldn't most people find that a bit too ironic? (I am right now, and all I'm doing is thinking about it.)
Also, does it make much esthetic sense to put such authentic '70s-style keys on a modern, compact MK? Wouldn't that be like putting a rumble seat on a Ferrari?
I guess some people wouldn't care. Personally, though, if I did something like that, it'd be purely to say, "Ha ha, look, a modern MK with old-fashioned keys on it, isn't that funny." But it'd be a pretty expensive joke, considering I could've bought, say, a Realforce instead, or two Model M SSKs. I'm just saying.