I hate pet stores that sell animals. I've said it time and time again - hamsters aren't packets of crisps and shouldn't be sold like packets of crisps.
Until people realise that the only way we are going to be able to stop rodent mills/farms is by not buying the animals that they produce, any other effort is just going to be wasted and they are going to continue.
Anyone here who thinks buying pet store hamsters is a good idea should read this and take a good hard look at the photographs in it -
Why not use Pet Shops? Be warned, the photographs are upsetting.