Will you buy this 300SD for $5K?

[300sdlstretch]

Hi Guys,

I live here in the Philippines. I saw a 300SD 1982 US Version that says all original in an ad. I visited the car and saw it sitting in their garage under a car cover. The condition is as follows:

1. Exterior is smooth. Minor bumper scratches.
2. It was not registered for 2 years already. I assume it does not get on the road but says they usually start it for a warm up every now and then.
3. All gauges are working. No visible warning lights when I started the car.
4. They said the aircon stopped working just a couple of months ago when the the blower got noisy and just died down.
5. Molds are present in the upholstery specifically the door armrests, presumably a sign that's the car was just kept in the garage. Dash looks fresh without cracks (including the upholstery).
6. The power door locks are not functioning. Maybe it has a problem with the vacuum.
7. There is a slight noise coming from the engine belts.
8. Engine not as smooth but the is clean from any grease or leak (at least on the top portion where my eyes can see). Mileage is at 65k Kilometers.
9. Tested the sunroof and it's kinda slow but works.
10. Power seat adjustment for forward/back (passenger side) is jammed. Works only one backward.

My questions for benz guys here:
1. How much do you think will i spend on the a/c assuming that's it is just a blower problem? (motor? fuse? whatever... assuming they are telling the truth),
2. Is the power door lock problem easy to repair? How much? Hope it's just a loose vac hose.
3. What can you say about the noisy belts? Can it be solved by simply greasing them? Or you have to replace the pulleys and bearing too?(based on your experiences)

I am having second thoughts of getting the car because I'm afraid that I will bear the bulk of the problem though it seems to be well maintained. They have four other jap and US cars of latest models in the garage and my thinking is that they just kept the benz in the garage for whatever reason I don't know. They are just disposing it know because thay have a new car coming in and there is no more space so the benz has to go.

Please let me know your thoughts on this. If I were you, will you buy it for $5K? I hope you will find time to share me your thoughts.