Following the popular format introduced with The Lord of the Rings, these products are designed for collectors who appreciate the franchises artistry
Anyhow, since you and others have asked, I've gone ahead and thrown together a survey for anyone who might be interested: Thanks for the fast response, I completed the survey (don't mind the username)
For two mana it would come down, then make a bounty of Treasure which would allow you to sacrifice a bunch of it, anthem your team, and swing on in
You have: Sol Ring, Arcane Signet, Chromatic Lantern, and Commanders Sphere
At the time of writing, these cards cost around $600, $500, and $625, respectively
Given that nearly all of the value in MTG lies in rares and mythic rares, it means that Double Masters packs are technically worth more than normal, which is nice - but that worth should be for the players alone and not for Wizards of the Coast