For years, computer-mediated communication (CMC) research has explored and theorized about the effects of technology on the process of interpersonal impression formation. However, as the Internet has evolved to allow users to accomplish more and more day-to-day tasks (e. g., the buying and selling of goods and services) little research and theory development has explored how non-interpersonal impressions form on the internet. This work seeks to extend theoretical perspectives on online signaling (the warranting effect; Walther & Parks, 2002) to predict consumer behavior on the popular online auction website, eBay.com. A content analysis of 217 completed eBay auctions revealed that auctions that featured higher seller reputation scores and actual product photographs (vs. stock photographs) generated more bidding interest and resulted in higher final sales prices. These findings as well as future theoretical development in this area are discussed.