are you looking for old tamas or the new ones? because there are some great old tamas you can find on ebay. i have a tamagotchi angel (really cute!!) and a tamagotchi garden (also really cute!) and, my personal favorite, osutchi/mesutchi, the wedding tamagotchi.
there are also tons of other first wave type tamagotchis - santaclautchi (my dream to have one of these!), devil gotchi, ocean gotchi, mothra gotchi, genjichi, special edition tamagotchis... tons!!