1982 300DT value?

[CarreraDan]

Guys,
I would like to get a stated value insurance policy on my girlfriend's 82 300D Turbo. The problem is I really don't know what the car is worth as this is my first Mercedes experience. The history of the car is fully documented in the service book, and she is the second owner. The car has 140k miles on it and has zero rust. Paint has been redone in the past but is very good, I would rate it a 8 out of 10 (I am very picky). The original owners did the European delivery option and we have all the original paperwork. The interior is extremely good except for the dash has a few cracks (I understand this is common with blue ones). Seats, headliner, carpet are all in like new condition. The wood trim is all intact and in very good condition as well. Everything works on the car except the a/c needs to be recharged and the cruise control sometimes acts up.

Recent work since May includes new brake calipers/pads and lines. Four new Michelin Harmony tires, rebuild of the front suspension with all new bushings, and correction of some vac leaks. Replaced the motor mounts too. I have been using the car as a fair weather driver and I have been getting upper 20's on mpg. Acceleration is very good and the turbo works as it should (can easily cruise at 70 without a problem). The color is silver and the interior is blue. Blow by is very minimal and the car starts very well. So, what do you all think it is worth? I really cannot find anything local to compare it to. Thanks and I can get some pictures tomorrow if that would help.