I considered the non-tournament legal cards exceptions to my self-imposed rule
Lugia (Shiny) Holofoil Set: Call of Legends Market Price: $278.99 The first shiny card on this list (but far from the last), this shiny Lugia card from 2011s Call of Legends was one of a number of shiny versions of legendary mons to feature in the set, including Dialga, Suicune, Raikou, Groudon, Rayquaza and many others
Hugs-a-lot Demon
Aside from TCGplayer, these other sites and apps are the best Pokemon TCG price checkers: Collectr (Raw Only) PriceCharting (Raw or Graded) Card Ladder (Raw or Graded) eBay (Raw or Graded) Where To Find Graded Pokemon Card Prices Luckily, pricing your graded cards is much easier, since the condition is already evaluated by a third-party company (BGS, PSA, and CGC are three of the most popular)
cards which are what the One Piece Card Game uses to get the rest of your cards into play are very common, but rarer versions of them, with alternate art, for example, do exist