I do not see liability in inspecting a house and recommending re-wiring with Copper wire or re-splicing all connections and pigtailing to Copper. The liability is in doing the pigtailing work. Also, what is the big deal in re-wiring a house for $15 k if the seller is making a $400 k profit on the sale? (Just kidding--I know sellers who balk at merely replacing a few receptacles or switches.)
