A disclaimer indicating that an offer or availability is contingent upon having sufficient inventory. Once the items run out, the offer ends regardless of demand.
This phrase became prominent in American retail advertising during the early 20th century as mass production and advertising expanded. It evolved from simple inventory warnings into a psychological marketing tool that creates urgency.
This phrase brilliantly exploits scarcity psychology - the same mental trigger that makes limited edition items more desirable. Retailers discovered that adding these three words could increase sales by up to 30% even when supplies were actually abundant.
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