I have had two Syrian hamsters from a pet store, at different times, one from pets at home, they lived long. One 2.5yr the other 3yrs 4 months!!!!
I used dust free sawdust from pets at home, they were fine.
Also I fed them both, cucumbers, carrots, sunflower seeds, monkey nuts, bread and hamster chocolate as treats. They came out every night and played on the floor and never bit me once.
It is all to do with care, love, handling and environment.
I could pick them up and kiss them and they loved it. They both sat on my knee and cuddled in for a snooze too.