Acorn-stamped and silver-bordered cards are banned in Commander
The +1/+1 counters may seem like some compensation for the tap drawback but it is basically just being given a tissue to wipe away the blood from the beating you just received, more humiliating than useful or comforting
We'll also be knocking 15% off the total because actually selling a card costs money in fees and shipping, and 15% is typically a good approximation of these costs (although if you aren't interested in selling the cards you open, we'll talk about the expected value without this deduction as well)
Even then there are just more potent lands I would want to use up my colourless allowance on
His ability to prevent opponents from casting spells from anywhere other than their hands means other players can't even cast their commanders from the command zone
Anzrag, the Quake-Mole Even a few years ago, the idea of a four mana 8/4 with upside would have been a ridiculous notion