Offers expire

An offer stays open for 48 hours. After that it lapses and can no longer be accepted, even by a seller who wants to take it.

What expiry looks like

The offer's status changes to Expired. The seller's Accept and Decline buttons disappear, the buyer gets a notification that their offer lapsed, and the amount stays visible in the thread as history. A nightly sweep is what flips the status, but the 48 hours are what count: an offer past its time cannot be accepted even in the hours before the sweep runs.

Sending a fresh one

Nothing stops you offering again on the same listing, at the same number or a different one. There is no penalty and no cooling-off period. You can only have one live offer per listing at a time, so a new one replaces anything still pending from you.

If your offers keep lapsing on the same seller, they may not be reachable. Check whether the listing is still live before you send a third.

Reservations do not expire

Once an offer is accepted the item is reserved, and that hold has no clock on it. Jinu will not release a reservation automatically, because doing so in the middle of an agreed pickup would reopen the item to other buyers behind the seller's back. The seller releases the hold or marks the item sold. If you agreed a deal and then went quiet, expect the seller to release it and sell to somebody else.