Syrians:
Snow White - 0 litters - died at just over 2 years (not sure, I was 7) - tumour
Mia - 0 litters - 1 1/2 - accidental fall
Cocoa Bean - 1 year 11 months - pyometra
Bear - still alive and active @ 2 1/2 years old
... first from a breeder and final three from pet shops.
Winter Whites:
Hail - 2 years and 2 months - cause unknown
Domino - 2 years 4 months - cause unknown
...no outward signs of illness in either of these, just found passed away. Both pet shop "stock".