I don't buy with the intention of selling, but I do buy with the thought in the back of my mind that I can probably get rid of a knife later, and maybe make a couple bucks, if I decide it's not for me.
If the value drops, though, I have no problem hanging onto a couple of extra pieces of steel. Any excuse to hoard some more is good enough for me <img src="/ubbthreads/images/graemlins/wink.gif" alt="" />