Almost never. A few weeks ago I'd have said never, but I did trade off a really nice little AYA 20 ga double years ago. Man that thing was pretty. Pretty wood, very nicely checkered, a little tasteful engaving, 28"-mod/full. I had bought it new as Sears about 1978 for $200.00. Which was a pretty fair chunk of change in those days.
The only reason I say I regret it now is I've reacquired a hankering for double shotguns, and now I realized what a really nice little gun it was. At the time I'd never really heard of AYA and it was just a "Sears gun."
On the other hand, now I've got an excuse to look for a nice 20 ga side by side.
For God so loved the world, that He gave His only begotten Son, that whoever believes in Him should not perish, but have everlasting life.
John 3:16 (NKJV)