Right now at least (for Fosters Farms Bowl) this secondary market is not attractive. It is true, the moment the bowl matchups are announced, it is always a Seller's Market on the first several days, as engaged buyers are first to emerge. (insert PT Barnum quote). Unless the ticketmaster 'fees' exceed the cut Stub Hub adds, there's no value on StubHub/Vivid listings today as I see it.
Since the Tickets are still available and plentiful at cost, the secondary market has yet to adjust for this, as brokers and sellers are seeking high margins (as they should) at the outset. In a funny way, this is like an IPO that is sure to pop. The matchup is fine, but there's simply not enough interest in the game (IMO) to support a ticket premium. If scores of seats are available today, five days after the matchup was known, there will be lots of seats available at face value a week, two weeks from now. Less supply? Yeah, but you will know with certainty what your highest price point will be.
come kickoff, the only Stub Hub listings that will command a premium, are the VIP sections, as those are the tickets which will have less desirable availability from Ticketmaster. In other words, on site you are going to see fistful of tickets in the air outside the stadium.