There have been a few postings lately asking "where do I get such and such a part". I hope you find this posting useful as it's taken me ages to put together.
I have found it advantageous to always start with my Official Porsche Centre (OPC) at Wilmslow
http://www.porschehost.com/home.asp?opc=wilmslow . I e-mail my list to them
info@porschewilmslow.co.uk , and they respond with the prices. Then when I order anything I ask them for my TIPEC discount - and I know I'm getting it because I have the pre-discount prices in front of me. The following are a few of the things I have asked about recently. Prices are pre-discount (although I've read plenty of postings from disgruntled members who have been refused the discount by Porscheshop) and include VAT but not postage - although Porsche have yet to charge me for postage -
944 564 623 00 sunroof inner seal, i.e. the thin trim that goes round the opening - OPC £7.94, Porscheshop £17.68 (yes, a tenner more).
944 512 043 00 rear hatch seal - OPC £64.05, Porscheshop (OEM) £70.86.
944 512 365 01 rear lock seal left side - OPC £16.29, Porscheshop £18.93.
944 512 366 01 rear lock seal right side - OPC £16.29, Porscheshop £18.93.
I recently bought the bonnet release backing plate and front cover from OPC for £5.40. To get the same from Porscheshop is £23.71.
Somebody asked about the rear hatch lock seal - £4.45 including postage from Ebay, £5.40 plus postage from Porscheshop. I don't have the OPC price, but you could telephone 01625 445006 and ask them. (edit - Lindsay reckons about £1.50 - whch I can believe).
After getting the OPC prices I then check Ebay and a couple of others, but have yet to beat OPC on OEM trims and bespoke parts etc.
For mechanical, like brake discs, pads, exhausts, cam belts and rollers etc, I start at OPC for a laugh, and then do Ebay, ECP, GSF, Berlyn, Frazerpart, and then look in the USA at Autoparts Warehouse, Autohaus, Pelican and 944online.com. I got a pair of OEM engine mounts delivered for £40 all in from the states. I usually get the best results from ECP and GSF - and always ask them for, and always get a discount.
Tyres and MOT is my local HiQ
http://www.hiqonline.co.uk/ based purely on price. Service and general maintenance is Autotech Services in Ashton-Under-Lyne
http://www.autotech-garage.co.uk/ the country's most honest mechanic who has looked after all my cars for the last ten years or so.
This is only my experience, and everybody will have their own favourites - but my favourite tends to be the one who charges me the least

Closing note - always ask the OPC first.
Somebody had better read this
