Playing extra lands each turn is incredibly helpful in a Landfall deck, so its no surprising to see Azusa, Lost but Seeking, Loot, Exuberant Explorer, and Exploration in this list
These older cards aren't too numerous, so a well-preserved copy could be worth several hundred dollars
Buying from notable auction houses (not ebay) and from reputable sellers is still the best thing to do for these types of cards

$19.99 Kefka, Court Mage (0398 - Borderless) Final Fantasy Variants $15.99 Clive, Ifrit's Dominant (0385 - Borderless) Final Fantasy Variants $23.99 Yuna, Hope of Spira (0404 - Borderless) Final Fantasy Variants $64.99 Cloud, Midgar Mercenary (0375 - Borderless) Final Fantasy Variants $4.99 Dion, Bahamut's Dominant (0376 - Borderless) Final Fantasy Variants $9.49 Gogo, Master of Mimicry (0377 - Borderless) Final Fantasy Variants $1.79 Raubahn, Bull of Ala Mhigo (0388 - Borderless) Final Fantasy Variants $7.49 Joshua, Phoenix's Dominant (0397 - Borderless) Final Fantasy Variants $3.99 Squall, SeeD Mercenary (0402 - Borderless) Final Fantasy Variants $3.49 Cecil, Dark Knight (0380 - Borderless) Final Fantasy Variants $3.49 Firion, Wild Rose Warrior (0386 - Borderless) Final Fantasy Variants $4.99 Zenos yae Galvus (0384 - Borderless) Final Fantasy Variants 0 results found
Then in Mirrodin design, I decided to try again with one small change