For Commander Decks you're talking anything beyond $60/50, while Play Booster Boxes at $180/160 or more are overly expensive
I got so many responses that I had plenty to write about to fill up a column with, so lets get cracking
Ostensibly, you have a few counterspells in your deck that can handle interaction with your opponents
While this may initially seem like an odd pick for a whole Secret Lair, Magic has no shortage of excellent Wolf Creatures to reprint, helping to ground the concept
To get the most out of Goldspan Dragon, you can consider using Gadrak, the Crown-Scourge, Magda, Brazen Outlaw, and Brass's Bounty.
For those looking to mix and match cards from these decks with their own, the Sapphire/Steel deck will likely prove the better option since it hinges more on having Hero cards than the more limited Madrigal family cards