Dealer's Choice is a Normal Trap Card.
Trap Cards are normally Set first and can be activated on a later turn, often in response to an action.
On the current TCG and OCG Forbidden & Limited lists tracked here, Dealer's Choice is Unlimited.
YGOPRODeck lists Dealer's Choice for these formats: Common Charity, TCG, OCG, Master Duel.
A listed print of Dealer's Choice appears in 2019 Gold Sarcophagus Tin Mega Pack (MP19-EN135) at Common rarity.
Among markets shown on this page, the lowest listed snapshot for Dealer's Choice is about $0.05 on Cardmarket (prices change frequently).