Looks like the standard Jin Bao offering to me. The color appearance is just an artifact of lighting and photography. It's quite difficult to get a photo showing the true color of instruments like this. I've taken pictures of brass instruments that came out looking silver, and of silver instruments that came out looking brass.
In terms of price, and once you would correct for things like import duties, shipping, etc., it seems to be in about the same price range as this: http://www.jimlaabsmusic.com/band-or.../prod_645.html -- which I would guess is exactly the same horn.
Gary Merrill
Wessex EEb Bass tuba (DW 3XL or 2XL)
Mack Brass Compensating Euph (DE N106, Euph J, J9 euph)
Amati Oval Euph (DE 104, Euph J, J6 euph)
1924 Buescher 3-valve Eb tuba (with std US receiver), Kelly 25
Schiller American Heritage 7B clone bass trombone (DE LB K/K10/112/14 Lexan, Brass Ark MV50R)
1947 Olds "Standard" trombone (Olds #3)