All I can say is WOW! Nice to see that theres some amazing cars still out there.
I agree with Scott to volunteer some time to help him get it out of the elements, maybe even help get it together. Besides it could work in your favor if the car gets moved from the same spot its been sitting in for so long. Outta sight outta mind kinda thing. Mentally it might help him deceide to sell it as its "gone" from the place he's seen it for so long.