These are horrendously low scary prices....$3300 for the 8" RC. You sure that you don't get shipped a box full of parts in which you need to build and grind your own hyperbolic mirror. $3300 would probably buy you a quarter of a star instruments secondary.
That said, there are some interesting items (possibilities) coming out of Asia of late...
http://www.intane-optics.com/product...ror-hm001.html