OMG! That is sweet! This has got to be one of the coolest AMF Roadmasters I have ever seen. A cool bike with full paperwork. This is very rare since I don't think AMF sold as many bikes as the Big Three (Huffy, Murray, and Schwinn). To give you an idea of the rarity, this is the bicycle equivalent to finding a '68 AMX with the window sticker still on it. How many of those are around?
Now, how much is it worth? I can't say. Normally, these AMF cruisers are beaten, battered, and the tank and rack are gone. So you have the condition. Two, the color. That is what makes it so cool is I normally see these in red or the occasional gold, never green. Then you have the all the documentation.
Be gentle with this one, it is a rare specimen indeed!