Over Limit 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, Over Limit is Unlimited.
YGOPRODeck lists Over Limit for these formats: Duel Links, Common Charity, Edison, TCG, OCG, Master Duel.
A listed print of Over Limit appears in Duelist Pack: Jaden Yuki 3 (DP06-EN024) at Common rarity.
Among markets shown on this page, the lowest listed snapshot for Over Limit is about $0.12 on TCGPlayer (prices change frequently).
