A little less than 20 years ago I had a complete set of Cooke Speed Panchro Series II and III lenses. Took me a long time to put the set together, 18mm Series III, 25mm Series III, 32mm Series II, 40mm Series II, 50mm Series II and 75mm Series II. I rented out the set thru a Chicago camera rental house, and about 10 years ago, unable to use the lenses on my still cameras, I sold the set for $7500, thinking I had made a great deal as it was three times what I had paid for them. Now they are worth four or five times that amount.
They rendered beautifully and I would love to have them now as they would "sing" on a full frame mirrorless set up.
Much regret on my part has made me better understand the adage of cinematographers I used to work with, "Never Sell Glass".
Best,
-Tim