I think I have only paid for an oil change once in my life for my own cars but the oil change in question, for $300, was on an BMW M3 (sports car), using at least 1 specialty tool, by a mechanic that comes to you (mobile), and filmed how detail/quality oriented he his.
Doesn't seem like toooo bad of a deal, if he is using fully synthetic on a car that may have an expanded oil capacity and you know the mechanic isn't going to fuck up your expensive car like some minimum wage grease monkey at an oil change shop. That is, if you are unable or unwilling to do it yourself.