Hi,
Monicas ideas are good about the flyers. Include bedding for hamsters because they have to be made out of natural materials coz my friends hamster died because they brought bedding from the market and the hamster pouched some and swallowed some and the bedding wrapped around the hamsters intestines and gave it a pro lap.
My hamster was from a very good pet shop. They wouldnt let you leave without picking up your hamster first. They also gave advice and everytime you go in there (if your regulars) they ask how your pet is and they recommend good toys and foods, they also pick their animals for sale up almost every day plus they dont let their pets go if it doesnt look healthy or fat enough. I love that pet shop!