Are you buying or selling? If buying, make sure they provide you the actual tread depth -- not a "percentage". "Almost new" still doesn't mean new. Typically, I'd figure 50% of retail for "almost new".
I love the auctions on ebay -- where they will claim 50% tread remaining. The tires wil measure 5/32s of 10/32s new. "NO -- you can't run a tire down to 0/32nds". Well, you "can", but you "shoulnd't".
As others have asked, which model? There will be much better resale on a Wrangler SilentArmor (good tire) vs. Wrangler HP, RT/S, etc. (not-so-good).