Taiwan has a lot of goodies stuff, I have been there before ^^
I still remembered how much i bought my F2A 256 cart for, Sing $238 , roughly about USD $ 139, which is actually cheaper for me then buying online.
China has a lot of bootleg stuff around - even original games they sell might be fake - be really careful. I had a friend who bought a F2A there and it couldn't even be flashed.