You may be right? I thought it was clear plastic, but it may be the camera flash on the metal?
Yes, 16K is a little high for a longbed.
What was it for sale for in Washington?
Personally, I wouldn't go higher than 10K for it, and that's only because it appears to be super clean. If it's worth it to you to not have to do anything to it and you love it, buy it, but I think you'll have a hard time reselling it for what you'll have into it. Add at least $1,500 for the A/C install, and that's doing it yourself with a shop charging it up.
I paid 13.5K for a 65 Mustang coupe and was told I paid at least 2, maybe 3K too much for what I got, but I didn't want a car I had to touch the paint on, this car was painted in 2006 and is still near perfect, so I paid it. If you add up the A/C, dynamat, stereo, and wheels I have another 3K into it.