It does have some potential. Short wheel base W126 with a euro 5.0 engine is a nice ride. Does it have european headlights along with the short bumpers? Ehhhh...that actually doesn't sound to bad.
AutoTrader is 90% dealers it seems. And the small group of private party sellers are basing their own sale prices on the crazy inflated dealer pricing.
It will come down to, does this have the potential of being easily restored to what a 70K mile example should look like? You could get a 4-5K premium price from the right buyer if it actually looks its mileage. Or was it put away wet so to speak....and it looks like it has similar wear and tear of a car with 150K/200K on it....