With pricing like this, I'm surprised we don't see more variation given how much competition there is between vendors. Newer vendors would typically be expected to operate on lower margins since they haven't yet built the reputation or customer trust that comes with a largely ''word of mouth'' marketplace. I'd be surprised if these prices are completely accurate, especially when the differences between vendors are often only around $20 per product. You'd expect to see much larger gaps, particularly between high volume vendors like PPHK and smaller vendors that are still struggling to gain traction. Those smaller vendors would normally be more inclined to lower prices in order to attract buyers, build confidence and gather reviews.