Sale 1 should definitely not be used here. You can redo this at 25 flat, which is a way better representation of what this sells for by itself.

Sales where multiple unusuals sell together for pure should be avoided as much as possible, as it is really hard to determine how much was paid for each individual hat (unless both buyouts were paid). In most cases, there's additional discounts for such deals (i.e where people discounts if someone takes multiple hats off of their hands), and therefore such sales almost always end up valuing the individual items lower than they should be