She's single-but not of her own volition. She can't be a power-player in her industry-she has to be so small-time, her famous boyfriend can Supermarket Sweep through her gallery on a whim. People hate happy women? Maybe. "Resale. hmm," says Marshall, her voice trailing off in a way that sests that word isn't quite right. "Secondhand isn't sexy. "And you'd better not say you can't make it...