In its entry for out v., the OED lists the obsolete sense ‘to set out (for sale, disposal, etc.), to sell’, with medieval attestation from Chaucer’s Wife of Bath’s tale and the Tale of Beryn. Surprisingly, the same mercantile sense is not included in the corresponding MED entry. The verb is a hapax in Anglo-Norman, and while possibly genuine (as a borrowing from English) it is not excluded that the word is a scribal or editorial mistake for out[r]er – in which case it may be added to the more common utterer.