Questions about 300SD

Looked at an 82 300SD today. Thinking it might be fun for a highway trip driver. It has 188 thou on the odometer. One owner, straight with a few squawks:

a. tach doesnt work

b. driver's window wont go down

c. hood needs repaint (paint dead)

d. a/c blows correctly, just not cold

Interior is nice, trunk is immaculate, radio works, etc. Car starts and shifts out well. Seller wants 2500 obo, is this a ballpark? are the faults listed common?