From my understandings there is only one pair of true Gehyra vorax in the country. I'm pretty sure they have never bred for him either thats why they are for sale.
This is what they should really look like. The ones for sale are pretty beat up. I'm not saying anything bad about the guy I dont know him. Just letting you know what I know. If you could get them reacquainted to each other and get them to breed they would be more than worth 600 bucks. Gehyra marginata


are really close to G. vorax. Good luck. . you get the true vorax get ahold of me if you get them breedin lol.
Blake