Normally Planet's 'seconds' are so minor in the flaws department that most companies would simply sell them as pristine, new products and blaim any knocks on the postman.
I've bought a couple of 'seconds' from them and the performance is the same as a full price item but just a small bit of faded anno or chipped chrome, etc. ie - the same as you'd get after a days play.
However, you pays your money, you takes you chance.