As a fan this offseason, many of us were clamoring for an ace, a #1 guy. Most of my suggestions were guys who weren't #1s, but had the potential to be... Josh Johnson, Peavy, both Santanas, short deals for guys like Liriano/Marcum. If Buchholz has a good postseason, creates a large amount of buzz, he could definitely be worth a good haul to someone, even if it is a GM trying to create their own buzz and sell tickets.
Put this into perspective... When Josh Johnson, Reyes, and Buerhle were traded to the Jays, the group pulled in some very good talented. Josh Johnson was the only guy in that group who wasn't just a salary dump.