What is the web-address for this company? Is there an https based e-commerce site where I can buy one? Also, is it the same company as: http://traditionalfilipinoweapons.com/Ginunting.html?
$170 is a really high price for a Filipino-made blade--I picked up two bolos for $11 a piece in the Visayas in December. That being said, the Typhoon ones look nice. I'll probably be in the Phils again in a few weeks, but $170 buys a lot of FHM balisongs and bolos...
Considering it's custom piece (i.e. - made to order, specifications for a purpose built design, attention to detail and fit and finish, as well as the labor of a dedicated artisan, etc.), I think it does deserve a higher price point. I've seen one up close and I can tell you it isn't the "hack" pieces you see in tourists traps or in the palengke (marketplace).
As for how high exactly, I can't aswer that. I believe that lies on the individual customer's satisfaction.