Tell buyers whether availability is live, manually updated, or subject to confirmation, and avoid describing a page as real-time unless that setup has been checked. If quantities change through counter sales, holds, or returns, update the record that controls the offer.
When a buyer asks about a scarce or high-value item, check physical stock before confirming. Remove sold variants promptly and distinguish an unpaid reservation from goods still available. If you are unsure of the count, say you will verify it rather than implying certainty.
State when an availability note was last checked if the process is manual, and recheck before payment. Keep supplier orders in transit separate from stock received and inspected. A public catalogue can make an offer easier to review, but the seller remains responsible for confirming current stock.
