just joined this site today. reason being i've just found a 73 850 commando in a neighbors garage. he want to sell it. it's been sitting in a damp garage with canvas tarp on it for many years. it turns over with a thump so it's not stuck. lots of pitting on rims excetera. he wants me to decide how much it's worth. he knows it's worth big money. i didn't look at the odometer and i can't remember what mileage he said it has but i do believe it's under 10k. don't know what to offer him for it. any suggestions??