When an offer is declined or expires
Declined or expired offers simply close — you're free to try again or move on.
Not every offer turns into a sale, and that's perfectly normal.
If your offer is declined: the seller decided the price wasn't right for them. You're welcome to make a new offer at a different price, or keep looking.
If your offer expires: offers don't stay open forever. If too much time passes without the seller accepting, the offer simply closes. You can make a fresh one any time the crystal is still available.
Where to see this: Activity → Offers shows your declined and expired offers, so you always know where things stand.
Nothing to undo: since offers are non-binding, a declined or expired offer never costs you anything.