Based on your selling price range I would have put this car to fetch $120K-$130K assuming they can install the SLS back.
If the car had a working SLS, I can only imagine the seller thought it would be a good upgrade to get rid of it as a daily driver. Actually he said so.

Problem is these are not daily drivers. Good old 2.6-5sp makes a great daily driver. EVO-1 are good track cars but at that price it would make an expensive track car.
So they are collectors cars. And in that, originality is key as you say.

- Cheers!

 

Since you've seen the car in person, I'll agree with your value estimate. I also agree that EVO Is are not daily drives. I think the seller was pretty clueless about how the MB universe works and that cluelessness was reflected in th bidding.