A booster's power ratings only matter in two situations: Downlink power matters if the outdoor signal is strong If you're installing a booster in a home or office and the outdoor signal is very strong, the maximum downlink power might be important
The fossil pokemon is soaring over his domain like a king comfortable on the throne
Funnily enough, this could go very well with Radiant Lotus in a Standard combo deck
Many other cards were limited or semi-limited, making tons of new decks enter the metagame while others fell off with these hits
To find the raw value of your card, you would categorize it into one of the above categories and then research listed (currently for sale) and sold prices for the card in that condition
Mermail Abyssalacia X WATER Link 2 [ Sea Serpent / LinkEffect ] ATK 1600 DEF - 2 Fish, Sea Serpent, and/or Aqua monsters Monsters this card points to gain 500 ATK/DEF