1976 Mercedes 300D

I am thinking about selling my '76 300D Mercedes and can't find any Kelly Blue Book value for it. I have searched everywhere. Can anyone give me an idea of what i could ask for this? I have given up hope of doing the restoration myself but if anyone is into that this would make a beautiful subject. It is the Powder Blue original color with the sunroof. I just replaced the radiator with the original Mercedes parts. It only has about 119K miles, never been in an accident and is in good condition.

Again, I'm just thinking at this point but I'd listen if anyone is interested in making an offer.:naughty: lol

Alan