i dont normally have that many going at once, id just started it up and hadnt closed things down... when im at school theres not many on there, like the messengers/P2P sharing programs/itunes etc get shut down, but when im at home its normally about 16 -20ish... lol
i got it from a breeder, pet shops are crap, they normally sell inbred, weak and sick animals when it comes to reptiles... if your going to buy, get one from a reputible breeder...