Strangely, LP copies have sold for $50 with NM copies hitting the $40 mark, though poor pictures might be the culprit in this case
Theres some serious money to be made in the Pokemon Trading Card Game now, especially as it enjoys somewhat of a resurgence of late, so it might be worth digging out those old cards and see what youve got laying around: you never know how much money you could be sitting on.
I am sad to say, however, that despite this new crop of Lessons, and commanders to support them, I don't see an incoming explosion of this mechanic
From a competitive standpoint, Whispers in the Well added a ton of competition-ready cards and shook up the meta nicely following Fabled's laying the foundations and bringing in new waves of players.
As such it is an incredibly efficient spell with a lot of raw countering power for the mana