The 140r is steep, Bare in mind you have to compete with the current market,
Lucky Mx etc
Most people will pay the extra for quality, (Uni Air Filter, Pro Tapers, SP Forks, DNM shock, Renthal Chain, Decent Tyres, Carb options etc.
No one wants to spend a grand on a pit then have to spend money on replacing the parts that have broke fairly quick
I reckon a bike with some decent spec parts will sell much better