thinking about buying friends 70 ss

[jacks996]

I have a friend that is finally thinking about selling his 70 LS6 4 spd car he bought new. Car is a number 2 and has 20k original miles. Still has the original tires and plugs in it. Has all documentation. He wants me to make an offer but I don't know where the market is on these. I am guessing it is worth about 100k but needs to be gone over and paint redone. car is 100% original. I have seen some restored ones for 100k that are like it. Car has been driven around the block every month since new but not tagged since 1975. It is not listed for sale any place yet as I have dibbs on it. Anyone have a amount I should offer to start negotiating?