1996 Concorde Possible Prob?

Hi everyone.

I am about to purchase my first car, a 1996 Chrysler Concorde. It has about 123,000 miles on it and is in great condition. It is selling for $2000. Anyway my question is this, when accelerating it makes a sort of hard to explaind grinding or maybe a clicking?, this is only when accelerating at slow speeds, once it is up to speed it is fine and when accelerating while already up at speed it dosnt make the sound. Also in reverse it does not make the sound.

I just wanted to see what you guys think may be the matter with it and if it is anything really severe.

Thanks for your time...

-Mike