I bought a brand new, packaged and unopened PDP Versus Fighting Pad on eBay, but had some problems.
At first I had to press harder to input down, down-back and down-front, but after two of three uses this problem stopped; however, the d-pad started making squeaking sounds and became a little twistable. I also noted that, since the first use, the buttons felt a lot looser than I expected from a brand new pad.
Since I ordered it from outside USA (Brazil, more specifically), my guess is the package was mistreated during its way. What do you think? Is what I reported normal for this model? Have you had any issues like those ones?