Those are nice bikes... but....

The 50th Anniversary Colnago is a classic, and may slowly appreciate if never ridden. Perhaps in a century inflation will catch up with the asking price. Then again, those of us who grew up on steel framed bikes will all die off, and one will be left with the young pups that believe everything must be aluminum, titanium, or carbon.

The 8-speed Klein probably hasn't bottomed out yet, so new stuff such as 11 speed, more Carbon Fiber, and etc will just push the value lower. Sitting around unsold just means it is loosing more value.