thanks. here's my updated pentax family photo.
wow, 85mm f2 is hard to find,
and congratulation for your M40 f2.8 on MX and 100mm f4 macro
I used to like collect all the m series as well, but then gave up, it take a lot of patient to hunt down all those,
I used to have M50 f1.7, M50 f1.4, M135, M200, then I sold them, and got a M35-70 f2.8-3.5, my friend used to have the M70-150 f4 and M80-210 f4.5 if I can recall, someone used to sell M40-80 on forum as well. luckily M series is more afforable to collect, as A series is expensive, and K series as well like those 2 f1.2s.
someone here sold a M35 f2 long time ago, good condition, it may be back in bns sometime in the future.
and I used to saw one canon guy selling the M28 f2 in bns and not sold yet when I last checked long time ago
hope you find the M120 f2.8 as well
the hard one to find is M20 f4, M400 f5.6; I have never seen any around yet.
M300 f4 maybe the most expensive in M series.