1983 300td Wagon Mercedes. These are getting harder to find. Good investment

Description

1983 Mercedes 300TD WagonTurbocharged 5cyl DieselRestore while driving, Great investment project
Unfortunately, I need to sell one of my projects to move forward with the others. I decided to let go of this one. These wagons are getting tough to find and the prices keep rising. This is one of the few vehicles that you can put money into and still get it back out when you sell.
This one runs and drives, engine runs great. The picture of the exhaust is while the car is running, as is the picture of the gauges. No smoke. Mileage reads 107000 but not exactly sure on the mileage because the odometer is stopped. Judging by the clean, rust free underside of the car, it probably doesn't have too many more miles than that.
The outside: Most body panels are in great shape with the exception of the passenger side fender which is dented, and the passenger side quarter panel which is both dented and rusty. Why the rust has been almost completely isolated to this panel I'm not sure. Pics will show more.
The interior: Good overall condition. Previous owner had a big switch and wire coming from the battery through the passenger door and stuck to the dash. This was run to the blower fan for the heater. I removed all that and fixed the correct buttons in the console. when I purchased the car, the console was badly damaged from the radio being stolen. I bought a good used console and replaced the bad one. Carpet is faded in the back, which hides the factory 3rd seat. This is a desirable option in the wagon.
The mechanics: Engine starts up and runs beautifully as would be expected for these old diesels. Transmission shifts through all gears with no issues at all. Brakes were not working at all so I replaced the master cylinder. This solved the non working issue but they are still spongy. May need to be bled again, car stops but with good pedal pressure. A/C probably doesn't work, defrost does. All power windows are in operating condition. Needs the odds and ends that you would expect of a 35 year old vehicle.
Overall an easy project. A good Father/Son car if that still happens these days! If you are a Mercedes person, you know how hard these are getting to find. Prices keep going up! My plan is to eventually get myself a perfect sedan for a daily driver.
Transportation is your responsibility. Car will start right up and drive onto a trailer. I would not drive it a far distance because of spongy brakes and also because it probably hasn't been on a long trip in quite a few years if ever. You probably should give it a good going over safety wise. Clear NJ title in my name ready to be transferred.
Any other questions, ask away. I'll answer em to the best of my knowledge but I am neither a mechanic or a Mercedes expert. I just like cool things! Thanks for looking and bid bid bid!