I saw a post where someone bought a purple snail from you. How much do you sell them for? How do you know if your snail is dying? I have a purple snail that Ihave had since it was the sz of a pea and it isn't moving or doing anything now. It is the sz of a quarter now. It was very active and all over the place. For the past 2 weeks it is not doing anything. I took it out of the tank and it isn't dead yet.