If it wasn\'t for the fact that he had such a strong season last year I\'d be of the mindset that he is nothing more than a flash in the pan. That being said, his value probably won\'t go much higher, so now is a great sell time.
If you can find yourself someone who is willing to overpay to get him, make a deal. There are players out there who tend to heat up in the second half of the season(Derek Roy, as an example), who may have a low value now.
What it comes down to is what you are comfortable with. If you feel taht he\'s exceedeing his talent, move him. Otherwise, sit back and enjoy the ride.
Just my $.02