I think some people don't think about small animals like guinea pigs, hamsters, rats, bunnies, etc being in rescues or shelters. I know I didn't when I got my first 3 boys. But after I found out about the guinea pig mills and backyard breeders I will never buy pets from a pet store. After joining this site I have even quit buying my food and supplies from them.
I adopted my 4th boy from a lady who runs a small animal rescue locally. We were talking last night and she knows someone who works at a local pet store. She was telling me that her pet store aquaintance has told her that the pigs are coming to them in such bad health with breathing problems that out of 8 piggies they send 7 back. The rescue owner also said that the pet store lady brought her a little girl that was having such respiratory problems because they knew she would die. It died on the way to the vet's office. How can someone send a sick piggy out there to be sold and not care.
Money is not that important to me to risk the life of an animal!