Nope no 10ga as you say and if minty they would be gone now. Seen a set of 84's go for 1500 on nutz last yearI thought they were over priced as well, but like you said, gun prices have sky-rocketed in the last year, so they may not be too far off. I have the complete set, except for the 36 inch barrel 12g. Don't think they ever made a 10g.
I grabbed a 36" only a couple of years ago just to say I had one I think and the price was right at 150 bucks
My complete set is 84's. I only have a 410, 28 and 16 in the 840's and honestly cannot remember if duck or not. Either still have too many guns or too old to remember