The E34 5 series tourings are unicorns. That green one looks like it’s probably a regular 528 but with Alpina wheels.
You can find a few of the ultra rare M5 tourings now. 1992 BMW M5 Touring for sale on BaT Auctions - sold for $55,538 on August 29, 2017 (Lot #5,617) | Bring a Trailer $40K for this high mileage example, or a staggering $120k for this leather clad version: View Listing Details
Would be an excellent daily driver, but hard to justify paying vintage 911 prices on a car that should be getting a mountain bike and kids thrown in the back.