There were some people at our mall back before Christmas selling those things. My kids were enamored so we stopped to look at them and listen to one guy's spiel. He said how they were great pets, that they are not recognized as prey by cats or dogs (although I can't see my cat *not* chasing some little critter that's flying through the air), and are really low maintenance, like they only pee once a day and poop once a week or some such. And he kept saying how cheap they are compared to dogs and cats because they don't need to go to the vet, as they're not susceptible to rabies or other illnesses and eat very little. I flipped through the brochure and noticed there was no price anywhere in it so I asked. Turns out one costs $589 and you could get a pair for something like $750-800. We quickly left!