Has The Mark, the Upper East Side luxury hotel renovation/partial conversion marked (sorry) by buyer backouts and bad publicity, finally found its perfect match? A tipster points out that Mark apartment #1501, which identifies itself as a "tower suite," finally sold. The deal, which hit public record yesterday, was a deal in all senses of the word: the final sale price was $10,640,712?for an apartment that, back in 2010, was asking $15.75 million. And sure, there are still six listings on the market, five of them PriceChopped by varying degrees. But this is still an improvement over the previous state of affairs.