Believe it or not, but, when it was first released, the FA 77/1.8 Limited was available only in silver. Then, eventually, Pentax released black versions (which were the scarce ones at first, of course). Nowadays, the silver ones are the less common "flavor" of 77/1.8 pixie dust (or pixel dust).
Here's my "new" black one next to my "old" silver one (before the silver one was sold to pay for the black one) --
[The original pics were taken probably about 15 years or so ago.]
And the FA 77/1.8 Limited is still my favorite FA Limited lens. Some lucky buyer is gonna LOVE this lens.