I guess my question is why wouldn't an all metal tank with Torsion bar suspension be worth as much as a Tamiya? So in my opinion the price point is fine. Consider the new Tamiya IS2 is in the $1,100 range.
A much different market then a $149.00 Heng long, but lets remember these all metal tanks are just that. Metal wheels, suspension, rubber tires, idler adjusters, Steel gears, metal tracks. You buy a HL plastic tank and just add the metal bits I mentioned and you may exceed this price point, and you won't have torsion bar suspension.
I think very soon we will be seeing tanks in metal not offered in plastic, so I think your comment is well understood as well.
Cheers