all rainbow rare pokemon cards 100+ Binder Collection Includes 5 foils in Any Combination and at Least 1 of The Following Cards, EX and GX, FA, Secret Rare, Tag Team, Unified Minds The top 10 most expensive

So you could say the set is on the lower end of the spectrum [in terms of popularity among EX sets]. Pratte offers a similar assessment

Its currently not the most expensive card to preorder in the set (that honor unsurprisingly goes to Elesh Norn, Mother of Machines), but when All Will Be One starts hitting those Commander tables as the hot new combo-enabler in town, plenty of players will be looking to scoop one up (or scoop at the sight of it)

Norns Choirmaster Hmm I wonder what a choir full of tooth monsters sounds like

Articles about a raw card selling for six figures might inspire you to dig through your old binder, but such events are rare

Having cards in your hand can easily become a problem, especially later in the game, so any card that allows an easy way to build up your hand is crucial