As for Yusei, Sherry wants to talk with him about what they saw that day
Established dealers can often tell you the card's history -- where it was graded, when, and sometimes who owned it before
There are cards that are both threats and answers (such as Teferi, Hero of Dominaria or Sandwurm Convergence), but KernTheGerm gave us this nugget of wisdom: there are no wrong threats, only wrong answers
Condition matters, and we're here to guide you, covering everything from Near Mint (those almost perfect or near-perfect cards, think PSA or CGC 10s!) to the less desirable damaged cards that nobody wants
The Gold is usually reserved for the set mascot so if you want a very exclusive version of the Alolan Vulpix VSTAR, this is the card you should be hoping to pull