The terms are not usually an antonym for undersell or undersold. Both terms are commonly used in two different ways. To undersell is to offer goods or services at a lower price than a competitor; to be undersold is to be that competitor. Overselling can mean first, to describe a sale obtained by over-promising or overstatement by the vendor of the item to-be-supplied’s capabilities, or where the item is to be developed, the time to delivery or the likely capabilities of the product when delivered. Alternately, where a vendor has a limited capacity to supply goods or services, overselling means selling to one or more customers more of the goods and or services than the vendor can actually deliver from the resources in its control.