(2/5/2021) In the Commander variant, a double-faced card's color identity is determined by the mana costs and mana symbols in the rules text of both faces combined
On the other hand, if your Magic budget is limited, coming out ahead over the long run doesn't make up for the fact that you're spending a big chunk of your Magic budget on cards that you might not really want and aren't guaranteed to be able to trade or sell for an immediate profit to get the cards that you do want
What a disaster
Gold Energy cards have historically done very well in terms of price, since collectors enjoy accenting their binders with them, and TCG players love to bling out their decks
Mime Psychic Rare 23/64: Nidoqueen Grass Rare 24/64: Pidgeot Colorless Rare 25/64: Pinsir Grass Rare 26/64: Scyther Grass Rare 27/64: Snorlax Colorless Rare 28/64: Vaporeon Water Rare 29/64: Venomoth Grass Rare 30/64: Victreebel Grass Rare 31/64: Vileplume Grass Rare 32/64: Wigglytuff Colorless Rare 1/64: Clefable Colorless Rare Holo 2/64: Electrode Lightning Rare Holo 3/64: Flareon Fire Rare Holo 4/64: Jolteon Lightning Rare Holo 5/64: Kangaskhan Colorless Rare Holo 6/64: Mr
Normal monsters with no effect have yellow frames, normal monsters with effects have orange frames, ritual summon monsters had blue frames, and fusion monsters have violet frames