I personally think that price is too high for those used binox.
But, I would check out the price of new ones to do your comparing.
www.cameralandny.com might sell those binox. If not, I would do a search for Khales binox on line to find someone who does sell them.
I've bought six pairs of binox from cameralandny and can state that they are an excellent place to make optics purchases. Thy're service is unmatched in the industry.
Martyn