50 kilo amps are not cheap to ship to the US from China. Trust me on that. I live in Korea. It costs a hell of a lot to ship something from the US to me.
As for the Chinese made amps, I'd recommend getting them through Singapore. I got my Line Magnetic 805 from Robert Lai at SG Live Acoustics. Robert ran it in for a couple of weeks, made some upgrades, checked it over, and it's been running quite well. He takes good care of his customers and his prices are remarkable. My local dealer was only selling the 508, so I went with Robert. For Muzishare (made by the same company), Quartz Acoustics in Singapore is a good option. They also have excellent prices and carefully run in their equipment.
The Line Magnetic is state of the art. Some of the garbage being said about Chinese equipment is just that. And I'm glad I got the advice I did from Audiogon folks about this amp, people like Facten for example.
I can live without a lot of the Sinophobia being expressed here. It's really uncalled for. A lot of Asian folk are being attacked senselessly in the US right now, which just goes to show that irrationality has no specific home.