I dont get the chance to do it very often, but once in a while, Ill manage a decent tournament finish
Prices are influenced by scarcity, collector demand, and competitive relevance
You can also choose a player thats low on life and force them to give you cards if you're playing an aggressive deck

Water Energy Color : Blue Associated with : Water-type Pokemon Common effects : Healing, defensive abilities Weakness/Resistance : Usually weak to Electric, resists Fire Grass Energy Color : Green Associated with : Grass-type Pokemon Common effects : Healing, energy acceleration, poison Weakness/Resistance : Usually weak to Fire, resists Water Electric Energy Color : Yellow Associated with : Electric-type Pokemon Common effects : Paralysis, energy acceleration Weakness/Resistance : Usually weak to Fighting, resists Metal Psychic Energy Color : Purple/Pink Associated with : Psychic-type Pokemon Common effects : Confusion, card manipulation Weakness/Resistance : Usually weak to Dark, resists Fighting Fighting Energy Color : Orange/Brown Associated with : Fighting-type Pokemon Common effects : High damage, simple effects Weakness/Resistance : Usually weak to Psychic, resists Dark Dark Energy Color : Black/Dark Purple Associated with : Dark-type Pokemon Common effects : Disruption, damage manipulation Weakness/Resistance : Usually weak to Fighting, resists Psychic Metal Energy Color : Silver/Gray Associated with : Metal-type Pokemon Common effects : Damage reduction, energy efficiency Weakness/Resistance : Usually weak to Fire, resists Grass Fairy Energy Color : Pink/Light Purple Associated with : Fairy-type Pokemon Common effects : Healing, anti-Dragon effects Weakness/Resistance : Usually weak to Metal, resists Dragon Dragon Energy Color : Gold/Orange gradient Associated with : Dragon-type Pokemon Common effects : Requires multiple energy types Weakness/Resistance : Usually weak to Fairy, no resistance Colorless Energy - The Universal Power Colorless Energy is the Swiss Army knife of the Pokemon world

Essentially, treat them with respect and all will go great
Im not sure why someone decided to buy out this card, but the non-Rainbow Rare version of Serena was not affected