Maybe I will just tell him it's nothing special and see if he will take $150 for it
Watch out, you may overpay with that approach.
I've got an 03A3 parts gun (made from random, mixed parts) with a receiver that looks like it was dragged through every salty swamp in the South Pacific. $150 would probably be a little high for mine.
But the barrel is a late-WW2 champ, beautiful condition, shoots like crazy.
Great rifles. Try to get it, you won't regret it.