When it comes to holding their value over time, many of the most valuable Pokemon cards are the oldest ones
Affectionate Indrik Arena Atzocan Archer Blizzard Brawl Cartouche of Strength Cherished Hatchling Curse of the Werefox Duel for Dominance Earth Rumble Fight with Fire Foe-Razer Regent Food Fight Frontier Siege Grothama, All-Devouring Guild Feud Hog-Monkey Rampage Joust Kels, Fight Fixer Kiora, Master of the Depths Kraul Harpooner Longstalk Brawl Magus of the Arena Malamet Battle Glyph Nessian Wilds Ravager Neyith of the Dire Hunt Prepare // Fight Prepare // Fight Rivals' Duel School Daze Skophos Maze-Warden Skyshroud Ambush Somberwald Stag Summon: Magus Sisters Tail Swipe Temur War Shaman Tunnel of Love Tunnel of Love Ulrich, Uncontested Alpha Unnatural Aggression You Come to a River You're Ambushed on the Road
Graded Population Report: Spinarak #102 Visualize the distrbution of grades in the chart
This is best as an early game card since it does nothing if Special Summoned
SR Super Rare Chiwen, Light of the Yang Zing X LIGHT Level 1 [ WyrmTunerEffect ] ATK 0 DEF 0 When this card you control is destroyed by battle or card effect and sent to your Graveyard: You can Special Summon 1 "Yang Zing" monster from your Deck, except "Chiwen, Light of the Yang Zing"