This is just my advice but you'd probably do much better to release it freeware or drop the price to a fraction of that, your tool looks useful but I don't think people would be willing to fork out a whole lot of money for something as simple as this.

And by the way I don't use 3DGS anymore myself so it's not like I'm trying to coerce you into giving anyone a price cut or anything. I honestly just think you'd do better to release the tool for free, as no matter what you set the price to I don't think you'd be able to get a notable amount of money from this. The attention you'd get for giving it to everybody would probably just be more valuable overall.