6 Cyl versions are not normally over 15K a STORM maybe a grand or so slightly more.
Genuine HBD can only be VY Series II and VZ. HBD Tag will be drivers front with Option: CAN

Brand new canopy fitted is well over $7000 painted and fitted so you have to factor that into a Ute purchase.

Should you buy one, you are sure to enjoy it.
Personally I wouldn't be going for anything less than a much loved, low Klm's, V8 SS.
But it all depends on your desire, cash flow and requirements.

There is a Genuine HSV HBD Black R8 Maloo VY SII on offer in South Australia (Super Rare)

Let us know how you get on.

Regards, Smooth