Without it, a lot of cards just become inscrutable, and Yuffie is but one example of this problem in Through the Ages
If you discard a card while you control Hades, Sorcerer of Eld, abilities that function when a card is discarded (such as madness) still work, even though that card never reaches your graveyard
3) Those needs/wants need to converge within at least $1.50-$2.00 of each other, and even that usually needs to be in my trading partners favor
The moment you do sell them, thats when the profit is locked in
It is simple enough for most people to understand and it is a great game for introducing your casual family to more complex euro style board games
This created some interesting interactions with the pro- and anti-monster cards