If we had to pick one word for the listings in the Time Warner Center, we might go with "confident." Substantial PriceUppers and sizable flip attempts are practically routine by now, and the listings don't do too badly for themselves. (Hey, this isn't the Plaza.) The latest Time Warner Center condo attempting to cash in is #67C. It was listed a year ago for $15 million. It came off the market in May 2010, but now it's back?and it thinks the luxury market is too. The new price: $18.375 million. We guess "good luck" is the best thing to say in these situations.