Bobby, depends on the condition and model if your talking the Vari x II and VXII there is a difference in coatings which will result in clarity and image gains. The new VX II is the same coatings as the Vari x III models. You'll also get click adjustments on the new VX II.
Is it worth the difference well only you can decide that, but optically speaking condition being equal the new VX II is a better scope.
If your talking the Vari x III as the used model and it is in good condition jump all over the deal.
PS if your leaning toward the new option and that price range I may suggest you do some web searching, also check out the Zeiss Conquest line while doing so. I saw at
www.theopticzone.com - various Conquest models in this price range, he also sells leupold, nikon, etc.
Best of luck!