1st edition base set PSA spreadsheet for budget collectors. Link in comments. : r PokemonTCG Deerling 91. A PSA 10 averages $185 on eBay, which shakes out to a 517% profit. Profit loss calculation is based on the lowest tier of grading which is $18.99. Prices are from Pikachu EX XY124 XY Promos Pokemon Tax, 18 cards Magic: The Gathering Dimension Valley Banned Gym Leader Challenge Pokemon Dragonite 151 236 (Reverse Foil)