Prices are also constantly being driven up, too, making it even more difficult for buyers to get their hands on any
One lord gives you a +1/+1 to your tribe, another gives first strike, another menace or trample, and then they all feel the same
Lastly, for how much money should i sell it
Whispers of the Muse (T1, Ext, S, Block) A favorite in "Turbo Xerox" (a blue deck which used minimal land but a ton of cantrips to thin out the deck), Counter-Phoenix (Shard Phoenix + Forbid) and Tradewind-Awakening (put Awakening on the stack, tap all your lands for mana, untap all your lands), Whispers has what might seem like a hefty price to pay for one card but you get to do it turn after turn after turn
And to be honest, I just found it quite enjoyable to expand my collection continuously, and don't consider it to be monetised in an overly blatant way, nor disturbing in the way it's structured