I know it's because we've been burned by lots of players, but it's getting annoying that any time a young Cubs player has a stretch of success, people immediately say we should sell high. Wells is under Cubs control for a long time at a cheap cost. His peripherals are relatively in line with his performance, so while it's almost certain that he's not a 3.00 ERA kind of guy, he's shown he can be a decent major league pitcher. League-average starting pitchers who make the league minimum are incredibly valuable commodities. Unless "selling high" means that he's part of a package that nets a superstar-type player, there's no reason to trade him.