Those are all good, and if you can somehow afford dual lands and put them in your Commander deck, then more power to you, but theyre not very exciting really
This year in Canada, a Mew Victory Orb card, a First Edition Charizard and an Eevee promo card have sold for $26,500, $15,500 and $12,500, respectively
Based on the latest market prices tracked on TCG Stacked, Krenko, Mob Boss is worth about $7.65 USD for a regular copy and $21.61 USD for a foil copy
Thats how someone could be confident enough to believe they can honor a sale of a card that is probably still in production right now
Since all Pokmon TCG booster packs cost about the same amount of money, its advisable to focus on buying booster packs from sets which have a larger number of rare and valuable cards