Invaluable, an online live-auction marketplace, has raised $33.75 million in Series D funding. Leading the financing round was Insight Venture Partners, with Ascent Venture Partners and Commonwealth Capital Ventures also participating. The company will use the capital to further extend its market position and accelerate its growth. Its website features a live platform that allows collectors and dealers to make real-time bids in auctions around the world for fine art, jewelry, furniture and more. As part of the financing, Bradley Twohig of Insight will join the company's Board of Directors.