I have a like new pair of Athlon Midas HD 8x42 that I'd sell for $200. It comes with box and everything when new, and they're not very old anyway. These compare very favorably to the Vortex Viper HD.
I have a pair of Leupold Acadia BX-2 in 10x42 with a case and original box that I would sell for less than 300. PM me if you are interested. I think they are two years old.