I expect that most 90's Euro cars currently have negative value, unless issue free, due to parts cost. But, in just a few years they will be hitting the junkyards as 1980's have, so parts will become cheap and easy. Now might be the time to buy one, but I wouldn't pay $3K unless primo.

When I bought my 1985 300D in 2001, I saw several that owners were asking $3500 (wouldn't take a dime less, "too much into it"), though many issues like a broken windshield, sagging seats, ... I finally found a well-maintained one for $2500 (new tranny a few years before). I bought a 2nd one 5 yrs later for only $400, intending to salvage the engine but ended up fixing the car. Thus, shop around and don't let unrealistic sellers sway you.

__________________
1984 & 1985 CA 300D's
1964 & 65 Mopar's - Valiant, Dart, Newport
1996 & 2002 Chrysler minivans