✔ 最佳答案
Shatin is quite a big area. People from Ma On Shan also consider themselves as Shatin too. Where about are you.
Shatin itself is not cheap. Sometimes some products can be more expensive than Kowloon ( Mong Kok ). So it might be cheaper to go to Mong Kok.
There aren't that many photo processing shops in City one but there are one or two in Shatin, Hilton Plaza if you know where it is, kinda cheap for Shatin but I don't know the price.
Ma On Shan chould be cheaper than City One you can try Ma On Shan Plaza.
There is a Kodak inside Tai Wai train station but not sure if it is cheap. Otherwise there are one or two in Tai wai behind the main street ( cos I don't know the name of it but its the next one parallel to the main one as you come out iof the train station on your left.
After that you can try Tai Po, its cheaper than Shatin and Fan Ling is cheaper still.
Good luck.