The other midrange decks are playing six to seven planeswalkers, which significantly drives up the price of the deck especially if the walkers are Sarkhan and/or Sorin
Silverquill, the Disputant While Silverquill, the Disputant doesnt look like the strongest commander among the five elder dragons, it might be the most exciting because it opens the door to all sorts of possibilities
While this card has likely been power-crept out of any real play (due to the fact that any player with open mana can also create lots of their own furry, long-tailed creatures when the Liege bites it), it still stands as an important historical Squirrel-enabler, likely leading to it retaining a price above $5
Their power builds up for each other Rat Colony card you control, which can get out of control quickly because its easy to cast multiple copies per turn as you get further in the game
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The cost reduction comes from your other outlaw creatures, and while this has no utility outside of combat, it's an easy way to reinforce the outlaws theme with a cheap creature that triggers payoffs like Vial Smasher, Gleeful Grenadier or Discreet Retreat