[Porsche-O-Phile]

Bah, your car. Change it if you want. Unless it's a super-pristine garage-queen type car or a relatively new one (mid 90s or newer) all the discussion about "values" is largely moot anyway. Older 911s (including 930s) command pretty well-known price ranges with a teeny bit of variation one way or the other for exceptional situations (accident history, major upgrades/conversions, restorations, etc.). But for the most part, people know what these cars are supposed to cost and pay appropriately. You're not going to bump the value hugely one way or the other with a color change unless it's a concours car or something along those lines.

I'm changing the color on my 944. At the end of the day, a nice non-original paint job is still 100X better han a lousy, deteriorated original one, and I'll be happier driving the car with nice paint.