BMWs as a rule are desireable only to BMW lovers and the K1 is definitely on that list. Few manufacturered, and rare while not being over-priced today warrant collecting.
I know a few BMWphiles in the area and among their R90S, /5 collection they all have a K1.
I plan on getting one soon, not for its collection worthiness but because I always wanted one and it will do touring easily.
2006 BMW HP2E: Teutonic Dreadnought
2011 Husqvarna TE630: Swedish heritage, German engineering, Italian flair
2011 BMW S1000RR: The Barvarian Bullet
Married men don't live longer, it just seems longer.
Sour grapes are a lesser man's fruit.