Well, it's hard to say. The one I bought was already built, so I didn't get much choice with the options (other thank picking that car out of a list), it had about 14k worth of extras, but the only ones that was really "worth it" were the PDK and the adaptive cruise. The sport/ madness button on the centre of the chrono selector dial on the steering wheel is good fun, but I probably only used it 10 times in a year. If you put your foot flat to the floor it soon picks up anyway, it just doesn't get primed like pressing the button in advance. The chrono also has something to do with the sports exhaust, but I never noticed much of a difference with that. Also the chrono is apparently 0.6 seconds faster 0-60, but I probably wouldn't believe that either.
If I was you, I wouldn't have the chrono as deal breaker, but if you see one you like, that has it, then fair enough. I reckon most would have that though, as it's only a 1.5k option, which for Porsche, isn't that bad. Porsche gave some spiel about cars with chrono end up being worth more, but that seems like BS, just like when they say "we'll give you a good price to buy it back from you".
I just couldn't think of any reason to select PDLS and PASM as options though. There's zero point in the latter, as the handling is unreal without it anyway. It might make a difference on a track, but who does that? PDLS is pointless, as the lights are xenon anyway.
Don't be worried about buying one private, or not from a Porsche stealer, I sold mine private and we transferred the funds in the buyers bank.
