First of all let me say I know this is an old thread, but I've enjoyed going through each post to learn more about these fins and which ones I would be interested in getting (which is what brought me here anyway ~ research and reviews).
I noticed someone saying he couldn't justify $500 for a pair (actually not that expensive anymore according to the website). However it's really about the value and quality of the product as people like Bob and DA have pointed out. Maybe Bob should do some videos like these ones that show people why their product is more expensive than the competitors, or just the cheapest you can find.
This first one is for my friend's portrait studio. People would ask why his portraits were so expensive (rather than just getting a photo blown up at costco, etc.), but after seeing all he does they realize the price is worth it (if they really want such a keepsake portrait).
mcneildesigner
This second one is for a leather bag company, and I love how he sarcastically shows how to "fake" his bags, however what it really shows is why their bags are superior and worth every penny. Will everyone be willing to shell out the dollars for their bag, of course not, you buy what you need and can afford, and if you really want something because you see the value in it, then you save until you can afford it.
I haven't tried the Force Fins yet, but I really like the idea of them, and the reviews from so many people, that's why I'm interested in them, and yes I'm willing to spend more on fins if the performance, and quality meet what I'm looking for.