I also use at least two copies of Acorn Harvest, because it acts as a super Chatter later in the game (preferably after Squirrel Mob is on the table)
For example, the V.1 can usually be purchased for less than $1 and another full art variant is usually priced at around $40
Ninjas are on the shortlist of decks I want to build most in Historic once Jumpstart: Historic Horizons is released
These errors, as well as the print quality of the Revised cards, spurred WOTC to produce their Summer Edition series, which is sometimes referred to as the Edgar or Summer Magic set
It would be easy to add many more cards to this tier, but I have deliberately aimed to be selective here in order to show off the cards I actually think are strong, rather than cards that will see play as a 1-of or in some fringe deck
In Magic Online, the economy is much more fluid and the supply of cards in the secondary market is consistent and there are always sellers online ready to fulfil your capricious needs