Porsche seats are the ones or seats from a sports car like a Toyota MR2. Look for thin seat squabs. Saab seats are proper seats but the squab is massive.
Mine were £70 in good nick. Trouble is the trimmers I've tried want £450 to retrim them! I think they hear the word "Porsche" and think kerching! I gave up getting them done and fitted them as they were. Far more comfortable than the Saab 9000s they replaced.
Got mine out of a boxster for £240 delvered. Old ones needed taking out, runners carefully removed on drivers side and the swivel base on the passenger side. M10 threaded bar and nyloc bolts and spacer plate (£20 from Jewsons) Job done. Wired up so they are all electric adjustable too. Im 6ft 3 and they are just low enough
You don't always need to look out for a specific auction for seats as breakers often just advertise the vehicles (or rather a 99p auction for a wheel nut), then you can contact them to ask what they have available. That's how I got mine, £50.
I don't know about the boxster seats, but my 944 ones where just and earth and a switched live... ran mine through a 16amp fuse, as it blew out the 8amp one that I initially used
It was just a live (spare from fuse box) and an earth. All switch gear included in seats. Very simple.
Thats good to know, would have avoided elec seats if it would have been a big job but sure I'll manage that then. Thanks for the tip.