Boldus...
Congratulations on getting the PSR 2000. It is a super sounding, easy to operate (once you get the hang of it) keyboard.
Did you get it at a "scratch and dent" price? A new, right out of the box KB should not have any blemishes. The PSR 2000 may show a little more wear with use than some others in that the plastic housing is simply spray painted the silver color. I have been using mine professionally for over a year and some of the cosmetics are showing wear from constant use.
The quality of construction issue has been covered here several times...but if you handle with due care...you should not have any problems with it.
Eddie