Should I or shouldn’t I…

Hello together, I have just the possibility of an older lady to buy an 854: Bj, 1996, about 140,000 km run, outside so far O.K., TÜV expired, 2.5 10V, 144 HP I always liked the cars, but somehow we never got together. So I did some research about weaknesses and so and then examined the car more closely: Cuff of the drive shaft to the right completely through, left brittle ABS lamp lights brake discs rusted, because the car already stands engine ran so well, test drive is not possible but EURO I you want to have the car away soon and ask me, because it knows me as a “car screwdriver” from the neighborhood. And now I am back and forth, I have already too many cars and am not sure if I should tie it to my leg, and what would you do maximum. The limousines are not so asked? Are there still serious weak spots that I should check in each case? I drive for example after season W201, W1 but the standard advantage of the spare part 😉 Thanks very much too.