I anticipate hell see some mild success in aggro or midrange GW builds, and if a Bant walkers style list pops up hell likely have a slot
However, it is important that you first learn how to determine the state of a card
And a friend of mine could only find 4 for sale on japanese marketplaces
Card condition may be indicated by HP, MP, LP, and NM. These mean heavily-played, moderately-played, lightly-played, and near-mint. Condition is a huge price factor, and you can find a guide here
In exchange for using up your Supporter card for the turn, you can use Cherens Care to pick up a damaged Colorless Pokmon and all cards attached to it from your field, denying your opponent the opportunity to take easy Prize cards from its knockout
After having my best cards in a binder for a while, I realized I would rarely take them out and look at them