A year ago, in a Khans of Tarkir Standard dominated by many of the same decks (Jeskai, Abzan, UBx Control) and cards (Siege Rhino, Mantis Rider, Wingmate Roc), there were two decks that cost less than $115 (UW Heroic and Mono-Red Aggro) and only a single deck that cost more than $400 (Abzan Midrange)
Custom Handmade Avacyn, Angel of Hope proxies made from real Magic the Gathering card with many different alternated arts available for purchase.
Memnarch This is more kind of gruesome stuff, but memnarch is the opposite of Arcum on the fact that Memnarch wants to turn flesh into artifact or basically make everything an artifact
This is in effect at all times the creature is on the battlefield
When you combine that problem with the sheer volume of sets and products released each year now, its hard not to be constantly reminded of the fact that Magic is a business - and a good business at that
Keep all Anna or Elsa cards (unless you have two 3-ink Annas) as when you get to play them, theyll always have a use