Why is Endless Punishment so expensive?

I really really love the way this deck sounds like it plays and apparently so did everyone else. Is it because of [[the lord of pain]] and [[valgavoth, harrower of souls]] combo? The price compared to the other three precons is crazy considering this is a newer set.

No precon is worth that price, so should I look into a deck themed around those two cards or bite the bullet and aim for the precon?

Any advice is much appreciated :)