hmmm ... well, you're an unadventurous lot!
But seriously, yes, I know that there would be a financial hit (to say the least) if I were to sell it. And it's clear that a lot of people would be put off buying because of the lack of OPC stamps.
However, to me, my 4S is (almost) the perfect 911. It's NA with a lovely sound, ridiculously fast and I totally love it. I don't intend to sell it for a least another 8 years and possibly a lot longer.
I tend to keep my cars for a long time. My previous BMW (a 5-series E34) I had for 22 years. My Landy 110 Defender (naturally air-conditioned due to the holes in the bulkhead and 0-60 ... eventually) I've had for 25 years. Apart from welding (a lot, believe me) I do all the servicing. My current DD is a BMW 525 F11 - 6 years old, serviced by me for that whole period. Good, reliable, more toys than you can count and boring as hell. I'll keep it till it falls apart (or I do).
When I said almost perfect, I'd like to make the following mods:
1) 911.2 GT3 Sport steering wheel - I really like this. Much nicer than the equivalent on the 911.1
2) better sound (and I don't mean Bose). I have the basic sound system and I've listened to both it and Bose. Couldn't tell the slightest difference. The only advantage I can see for Bose is that the car is pre-wired for something better.
3) rear camera. I have it on the BMW and really miss it on the 911. There's a good DIY write-up by Plenum. My main hang up on this is that it involves drilling a hole in the body somewhere.
I think #2 & #3 would rule out the extended warranty.
The cost of the service doesn't bother me - it's the feeling of being rooked by the OPC for something which, at the end of the day is a simple oil change (+ plugs at a major).
However, adding up the costs over 8 years (say) comes out roughly like this:
Extended warranty = 8 * 1k
Major Service: 3 * 0.8k
Minor Service 3 * 0.6k
Total = 12.2
The cost to me for a service is (again roughly)
10l Castrol or Mobil oil = £80
2 * air filter = £70
6 * plugs @ £5 each = £30
Total = £180 for a major and £80 for a minor not including brake fluid and brakes, which are not that expensive over 8 years), so total over 8 years is £700.
That leaves £11.5k that isn't in the OPC's (or warranty company's) back pocket. That covers a lot of things going wrong - and I can also do my mods. As far as I can tell from reading around, the main things that fail are the change-over valves (COVs). It's pretty rare, though not unknown, for something major, like the PDK, to fail.
So there is choice between safe, boring and feeling robbed and on the other hand getting exactly the car I want with some risk.
That's why I was curious if anyone else here had gone down this route. Once started, it's not really reversible and I've a few months left to decide.