The cheapest legit source should be this authorized dealer of Lexar in Beijing
Only 399 RMB / 66 bucks for 128GB
Other than that, Komputerbay is selling one for $110 through Amazon
It ain't getting much better unless we hunt for deals off eBay or wait for something like Black Friday etc.
Sometimes there might be some insane deals posted @ FatWallet / TechBargains etc. but they might involve rebates and such.
Heck, I might wanna take the plunge and get this Lexar 256GB for 1,500 RMB ($250 or a dollar per GB) after Chinese New Year since they're also claiming to be another authorized dealer
The question is can we order this 256GB from Taobao to UK? At £150 is a great price. I hope it will work with Mini and Video ipods.