Let's start with an ironic price chart I posted on Twitter a couple of days ago: Here, we have the Legends printing of the aptly named Greed, which more than doubled in price a couple of days ago (and, compared to a couple of months ago when Greed was around $30, increased about 1,000%)
If you only have $40 in your Magic budget, which deck should you buy
Gallery and List of Buyback Cards Allay Anoint Blast from the Past Brush with Death Capsize Change of Heart Clockspinning Constant Mists Corpse Dance Demonic Collusion Disturbed Burial Elvish Fury Evangelize Evincar's Justice Fanning the Flames Flowstone Flood Forbid Haze of Rage Imps' Taunt Innocuous Insect Invulnerability Lab Rats Mind Games Mind Peel Mystic Speculation Pegasus Stampede Reaping the Rewards Recruit the Worthy Reiterate Searing Touch Seething Anger Shattering Pulse Slaughter Spell Burst Sprout Swarm Verdant Touch Walk the Aeons Whim of Volrath Whispers of the Muse Worthy Cause Wurmcalling Best Buyback cards Reiterate Much like Fork, Reiterate allows you to copy an instant or sorcery, but now you can do it every turn thanks to buyback
The second issue saw an alternate-art version of Plateau printed in Revised Edition thanks to the original art being corrupted and lost
It would rate around the middle of this list, if the cards weren't about to rotate out of Core constructed
