I have a very nice Leica-R 70-180 zoom that I bought on this forum maybe a year ago. I think I've used it maybe a half dozen times since. I'm cleaning house on all the underused gear (prompted by recently dropping 10k on a 4x10 and lenses).
The glass is perfect. No haze, no fungus, no cleaning marks, no internal dust.
So here you have it... asking for $6500