I'd say it is down to production cost and not being able to produce it at the price they originally planned, very difficult now for any new turbine manufacturer to beat Kingtech pricing and still get a reliable turbine, if it was only $100 cheaper would you buy it over a kingtech, $200 cheaper? I think many would want a significant saving over a known reliable turbine, to take a chance on something unknown out of china.
Even HobbyKing who are the masters of low pricing, could they sell a reliable turbine for $500 less than a Kingtech 80?
The original budget turbines manuf Jetjoe cant seem to, a JJ1800 is now $1499, equivalent kingtech K80E $1725 would you buy a Jetjoe to save $225 ?
Interesting a JJ1800 from the UK dealer is £1136 you can pick up a Kingtech 80E from Als Hobbies for £1279 !!! as you Americans say it is really a no brainer.