ONCO
ONCO definition by Slang.net
This page explains what the acronym "ONCO" means. The definition, example, and related terms listed above have been written and compiled by the Slang.net team.
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Are you financially literate?
Online sellers use ONCO to stand for "or nearest cash offer." When a listing includes this acronym, it means the seller is willing to accept an offer less than their asking price - but only if you can pay in cash.
You're most likely to see this acronym on Craigslist, Facebook Marketplace, Nextdoor, and other online marketplaces in which buyers and sellers eventually meet in person. Because buyers and sellers don't know each other, sellers typically ask buyers to pay in cash (rather than via check).