I have......
1 Tama + Color (running)
1 green Santagotch (off till Christmastime)
1 Music Star (off)
1 Chibi (mini)(off)
1 Uratama (off)
1 Akai Keitai (off)
4 v4s (off)
1 Familitchi v5 (off)
1 Familitchi v5.5 (off)
2 v4.5 (off)
2 v3 (off)
3 v2 (off)
2 v1 (off)
4 1996-97 (off)
1 Ocean (off)
I see my Tamas as a collector's item, and try to keep them as mint as possible. I have a big wooden "Gotchi Barn" that I keep them in. I just remove the batteries before putting them away. I have had as many as 10 going at once, but it was just too much to handle, with work and all.