Winston Art Group, one of the market’s two main art appraisal firms, has announced a merger with Artory, an art and data venture originally backed by Hasso Plattner, to forge the new firm called—wait for it—Winston Artory Group. The combined company aims to offer wealth managers greater visibility into the asset value of their art. What’s interesting about the deal, however, is that it arrives as the art market has lost much of its mojo. Public transactions are down, and there’s the perception that the top of the market has slowed to the point where valuations are falling.