My GTS is in the shop right now getting its 30k service. $tealership has prices for services listed on the walls of the SA offices. I'll take a closer look to see how they handle this with the different model Porsches--I honestly don't remember.
30k service - $850 (includes oil and spark plugs!)
brake flush - $385
I'm getting an alignment as I just put on new summer 20" rubber, with the $tealer matching TireRack pricing (I think they actually source from TR since TR has a warehouse not far away here in CT, and the $tealer is a Penske shop that does big volume). I'm also having a new steering wheel installed--ordered the part at the $tealer, who matched the Suncoast price and quoted the install cost up front (1 hour of labor). Couldn't be happier with the pricing and my SA being up front with most everything. Will confirm the pricing and post results when I pick up the car later today.
Oh, and I might add some thoughts on my 2018 Macan Sport Edition loaner. It is an interesting spec with some performance options and imho is worthy of a mini-review/GTS comparo.
I had my brakes flushed by the dealership here in northern Colorado. $253, including $49 for a liter of brake fluid. I only had them do this because my car was still under factory warranty. That warranty just expired. Henceforth, I will do it myself using my pressure flusher and $15/liter ATE Typ 200 brake fluid.