You would sell for your cost, knowing that the person is likely to turn around and sell it for a profit? You wouldn't think twice about posting it at $166, knowing that people are buying them at $200, or more? If so - good for you.
Personally, I might sell at cost + shipping to a few people here; but I wouldn't be advertising it at that price. I've sold enough knives at lower than normal prices that I'm not going to feel badly about getting a little more for this one. I'm not the guy that routinely buys knives with the intent of selling for a profit, though...and I tend to get as frustrated as anybody else when something I want isn't available because people "invested" in them.