I sell every one I put on the table at shows. I've owned a 24H-DL in 22/20ga since around 1967. Shot a good number of bush partridge (ruffed grouse to the purists), prairie chicken, and the odd Hungarian. I've never noticed the "regulation" problem, seeing as the top barrel is .22 and the bottom one is a shotgun. Possibly a problem when using slugs, but I've never fired slugs out of it.
I wouldn't pay $1100 for an ordinary one, but, if I was a collector, and the gun was, say, 357 maximum/20 or 12, the maybe.
I have one that is 30-30/20ga. It is like new, and would make a good gun for the woods.