My only thought is; in this current economy and job market, do you really wanna mix business with your personal life?
Suppose, worst case, you buy the car and it implodes w/i 90 days. Are you going to be hampered in going after the seller because he's an 'executive' where you work?
If it were rare and exotic, maybe the risk is worth it. But, for something so common as a Boxster, I'd give that alot of thought were I you. It's not as if you're getting a great deal or anything... I as recall, you're going to be paying the published used price.