People selling their cars at ridiculous prices on FB Marketplace

Anyone else notice this? I'm not looking for a vehicle but I'm a member of a few "for sale/wanted" groups on FB and seeing vehicles being sold for way over book value. For instance, this morning I saw a guy selling a 1995 Ford F150 for $12K. I won't lie, this truck was in pristine condition with only 60K miles but when you go on KBB and punch in the numbers and grading the truck as "excellent", the max private party price is less than $5K. What makes this truck so special that you're trying to sell it for well over double what it's wort? Will it give me a handy every day when I drive?