Buying used is too much of a crap shoot for me. The fact the person is selling the component makes you wonder why. You don't know how it's been used, or abused. Trying to get more for your dollar buying used is like trying to get something for nothing, May very well work out, but buying new eliminates that risk factor. Better to buy a new Volkswagen, than a used Mercedes at the same price. Of course my father was a used car dealer, so I learned to stay away from anything used. Your experience may be totally different.
Mike