Over-pricing I bet is one of his tactics. Some people place a huge price tag on something in hopes that you will just buy it because it is so expensive. He hopes your thought proccess will be "well it must be worth it if he wants that much".Remember, what the auction is set at is NOT what the fish is worth. From what I've seen Betta Hero tends to way over-price his bettas although you'd have to ask a breeder what the true value of one of those fish is.
Although it is pretty I don't think "Big ears" is necessarily a good trait (NOT speaking from a breeding stand point). I would imagine it must be a pain swimming with those. Like trying to walk with flippers on.