It's great that there is so much choice of film available.

Here in the UK, the cheapest price I can see for 5 rolls of Shanghai GP3 is 17.90 including postage. My regular supplier sells 5 rolls of my favourite film, Kodak TMax 100, for 18.99 including postage.

For me personally, it's not worth trading reliability and consistency to save 1.09, or .27pence per film. Of course, the market may differ in other countries.