you have to take into account he may be paying full coverage while GuessWho may have bought their BRZ/FRS cash.
That's still a lot of money. I bought my Malibu with a loan, so I've got full coverage, I'm 26, and I pay around $86/month for it, but I have a clean record. Obviously the Malibu's not as sporty as an FRZ/BRZ, but the price is similar.