Well, lemme see...
I sold my first 44 mag, a 1967 29-2 "S" s/n. It was a 6.5" model too.
Bought it back!
Later I sold a 25-7 that I hadn't bothered to shoot since I bought it new in 89. MISTAKE!
I bought it back too.
Then there's the 1989 Mini 30 with the .308 bore I sold off since it was "too small a round". D'oH! It's gone forever, but I found another just 500 units different according to s/n with a .308 bore and it was in a glass stock to boot! Real happy with the replacement. It shoots a 150g NBT accurately.
Not to forget the 6" 586 ND I bought new. Traded it back and forth with a friend. He went south and is no longer around, so I replaced that one with a 4" 586-1 which IMO balances and looks better. Besides, that old 6" 586 was a spitter, sent it to S&W and local gunsmiths, but it never got fixed, it always spit.