Have a choice to buy either new or used in my price range.
Used Kastle LX82 $600
New Head I Peak 78 $699
My preference is for a front side ski that I can occasionally take off piste......
Used skis will usually be perfectly fine. Like davluri said, check the condition in pictures (or in person if you can). But the Head is a good ski. I have experience selling them, and they have been one of the most popular skis we have had.
This ^^^^^. And if they aren't totally shot, Kästles - hands down.