I really think it depends a whole lot on where you are. I've kept beds in the same situation in the past and never could get them sold for any more than what you've been offered. And yes, some were brand new one's, too. If you don't foresee putting it back on the truck at some point, and especially if you don't have a good (covered) place to keep it where you won't cuss it every day, I'd take the money and run. I know the others are right that if you had to buy that bed through a dealer or body shop, it'd cost several times that, but if your part of the country is like mine, 3/4 and 1 ton factory pickup beds are everywhere, and cheap. The tailgate is the most valuable part, but I'll guarantee you whoever offered to buy it knows that, too.