I think Martin may have signed off, so I will spoil the surprise. First, it's a 1988 truck. That means it has a 5-digit odometer. The seller lists it as having only 15,000 miles. And he's selling it for $8k. And it is really pretty clean.
However ...
If you look carefully, you will notice a few flaws:
1. The floor mats on the drivers side. Floor mats mean the carpets are worn and he doesn't want you to see that.
2. The drivers door upholstery under the pull handle is very worn.
3. The passenger side door is missing the pull handle end cap/cover.
4. The open tailgate shows MANY scratches and scrapes on the inside, clearly from many years of use.
5. How old is that spare tire? With "only 15k miles" it should be brand new. Right?
6. The under hood shot that shows the brake master cylinder shows clear leakage on the side. 15k mile vehicles don't leak like that. In addition, while it's hard to really see under the hood, the air intake has a small rust spot forming. That generally only happens after many, many years of driving.
Therefore, this truck - like every other K5 that I have seen that lists "only" xx,xxx miles, is a 115k mile truck. The wear and tear from daily usage gives it away EASILY.
It's worth MAYBE $5k, or $6k if the engine/tranny are in tip-top condition, are brand new, or were rebuilt in the last 10k miles.
Clever seller.