Former Furniture Currently listed: Eero Saarinen swivel chairs with his tulip base. Price: $900 for set of three; offers accepted. The scoop: This site features showroom and interior decorator custom designs as well as previously owned items that might be found at 90210 estate sales. Easy to navigate by category, the sometimes-slim inventory is sold on consignment (nonretailers are eligible, but sellers pay a 40% commission to the site). That can translate to higher prices, but some items feature a "motivated seller" button that allows buyers to haggle.