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Beyond that, any deck that runs Basic Energy is certainly a reasonable choice to include a few copies of Giovannis Charisma into

For collectors who dont care about reselling their cards, local grading companies such as ACE grading in the UK or ARS in Japan provide incredibly well designed slabs for people who are more interested in protecting and displaying their card than selling it godcomplex: A third thing to look at IMO is Pokemon autos (PSA being the only option IMO)

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Rainbow rare cards are a cheap way to make your deck look glamorous, as collectors dislike them more than the full art versions of cards