Welcome to Stovebolt Tolisko and thanks for offering these up.
Just from my experience, but just because they're new and never installed, that doesn't make them good for safe use. If they had an extended stay on the shelf, they could be well past their prime, even though they look great.
I'd suggest, to help you possibly make a sale, that you take pictures of the tire details including the tire manufactured date codes and add that to your post. That way folks will know just how old they are and can make a choice on going for them or not.
Best of luck with your sale.
