Hi guys. I really do not like posting these what's it worth questions, cause I know its what the seller wants for it and what the buyer wants to give for it. But in this case I need your help.
I was contacted by a regular member here about my spare 77 W72 engine. He is looking for a Pontiac engine and I have one I could sell. Problem is neither of us know the fair market value for this, so we agreed to post it here to get a base average. See what the pro's feel

Here is what I know about it....
To my knowledge I have an original W72 400 that was removed from my 77 400 4-speed. I bought the car from an extended family member that parked the car due to a light knock. I never heard the car run ever but I know it was driven by his wife before he parked it. The genuis that he was, he decided to pull one of the valve covers to do who knows what and left it that way. Over the next X amount of time, the engine had water enter it from runoff of the shaker scoop.
Fast forward and I bought the car around the summer of 1997. I pulled the engine and upon doing so, drained the oil. When draining the oil, out came a mixture of water and oil. I feel pretty confident that the water was strickly rain water from the open head with no valve cover and not something else internal although I have no proof of that.
Since then, the engine has been stored inside my garage for the last 12 years untouched. It is still complete minus carburator.
I will be moving soon and would like to not have to move it again. The other guy would like a good deal on a Pontiac engine that he and his dad can rebuild and he can learn from. So we would like for you guys to offer your honest opinions on a fair market value. Any help is appreaciated. Thanks!
EDIT: I thought I'd add that I was thinking in the range of 200 dollars after a couple of gearhead friends thinking it would fall in the 2-3 hundred range. So if you don't want to price my stuff, thats cool too, but maybe you can say if you think I am in a good price range if nothing else. Thanks.