I currently own a V2 (another one is coming in the mail), a Japanese P1 which I don't use anymore, and 3 dissected / broken Tamagotchis:
1 V1 (no, not the one I accidentally bought, I gave that one to a friend)
1 V3
and a smashed Tama-Go (a lost bet, in which I had to smash a Tamagotchi if I lost. Since I hated this one, I had no problem)
I would never open up a V2, and my P1 could be considered valuable, so I decided not to.
(Nice avatar, BTW, NintenNerd. I love the game Ib.)