There are lots (3 lots of 3) FA 50 1.4 being auctioned at shopgoodwill.com.
One lot is going to close 1/11, now at ~620. Whatever the closing price is, I am glad it went to Goodwill. Kudos to the person who donated these!
For the unfamiliar, goodwill has their own auction site, and sometimes has very interesting Pentax stuff. This possibly a hidden secret few people here know. The closing price usually end up at marketplace price, as the bidders are pretty fierce and competitive. I may going to be frowned upon for telling this secret
Andy