What you are not seeing is that every time a new seller lists a Moat at a price near the Market Price, it sells, leaving behind cards with listed prices far above what the card will sell for
Captain Hook, Forceful Duelist A well-played card with a pricey promo version
The only reason to do that to players in a casual format in a casual game is to get off on the power-trip of curb stomping people
Whenever a creature is exiled from the battlefield, put a +1/+1 counter on this creature
They are balanced so that you'd get a large fraction of a card's worth of strength from the enters-the-battlefield effect on the front but would need to flip them for more than the average strength of a card
Although there are five decks, four players is probably the sweet spot five player games will go longer, three player games will go faster (but have less of a multiplayer feel)