Gross Merchandise Volume or GMV is a term used in online retailing to indicate a total sales dollar value for merchandise sold through a particular marketplace over a certain time frame. Popular online retail sites like eBay

EBay

eBay Inc. is an American internet consumer-to-consumer corporation that manages eBay.com, an online auction and shopping website in which people and businesses buy and sell a broad variety of goods and services worldwide...

, Overstock.com

Overstock.com

Overstock.com , also known by its shortcut, O.co, is an online retailer headquartered in Cottonwood Heights, Utah, near Salt Lake City. Founded in 1997 by Robert Brazell, under the name D2: Discounts Direct, it was a pioneering online seller of surplus merchandise which, upon its failure in 1999,...

, and Google Checkout

Google Checkout

Google Checkout is an online payment processing service provided by Google aimed at simplifying the process of paying for online purchases. Users store their credit or debit card and shipping information in their Google Account, so that they can purchase at participating stores by clicking an...

commonly use this term in place of sales or revenue. Site revenue comes from fees and is different from the dollar value of items sold.