As with any old lens make sure that the focus and aperature are smooth and working across the range.
I built a carry on work trip kit some years back that was my M4-P, one of these and a 35/3.5 and love it. While it was not the sharpest lens, it worked great when I needed it. Plenty good enough to still be called a Leica lens.
They are small and easy to carry in just about any pocket.
There are slightly bigger alternatives but they cost more and are hard to find.
$75 is an OK price IMHO as you do not need an adapter to use it on your CL.
I paid more for one with a dent on the front ring (making it unable to take filters) back in the late '80s.
B2 (;->