I am in agreement with many people on this thread! I love my Southard flipper. I've been buying/selling on here for the past year, mostly out of curiosity to try a range of different blades! It is the most expensive folder I have ever bought, and I'm pretty sure I will never sell it. Everything I have bought since its arrival gets compared to it, and if they don't replace the Southard in my pocket, I tend to end up selling them. I am not much of a collector, with no more than 4-5 knives in the "collection" at one time.
And, just because you see a knife frequent the exchange does not mean that there is anything wrong with it. If you notice, they also tend to sell quickly, so if something were a problem, why would people be snatching them up? As stated, some are impulse buys, some are not exactly the knife that people are looking for, and some are because life happens and money needs to be focused elsewhere.
I cannot recommend this knife enough though. It flips great (glad it is not AO), is comfortable in hand, and is constructed from premium materials. Way to go Spyderco.