Most of us will buy the filter(s), oil, and drop by any garage to get it done. Half price the delear however you are not going to get the regular Porsche specialist inspection and whatever tuning they do while they change your oil (tire pressure, check this check that). Dealer's $250 could be a good investment you never know.
You decide mate
+1
$90 for oil/filter +$15 for the local garage to do it.
Time is money. If you don't value your time that much, do it yourself.
If you make good money and would rather spend your time making more of it or spending it doing other things, it's a bargain.
That's true, and when I was grinding it out everyday there were things I knew how to do but didn't want to like roofing. When it comes to cars most people like to do their own for the hobby aspect and knowing the job was done meticulously.