Identifies one transaction for a listing. For Chinese auction listings (single-item listings for which there can be only one transaction), TransactionID is always 0, and for multi-quantity listings (for which there can be multiple transactions), TransactionID has a non-0 value. If TransactionID is provided, details are returned for the transaction, regardless of any time range you might have specified (e.g. ModTimeFrom, NumberOfDays). To determine the valid transaction IDs for a listing, you typically need to have previously executed GetItemTransactionsCall or GetSellerTransactionsCall and stored all the listing's transactions.
See the
Field Index to learn which calls use TransactionID.