Special edition Boxster add little value beyond the actual upgrades. Porsche simply do too many 'special editions'. And there is no existence of a die hard Boxster collector segment like there is for other Porsches. That's only because these people like giving all their money to mechanics who need the work.
The 550 has a very nice interior which can get very expensive in the aftermarket.
But not $35K worth. A fully optioned 986S needs aero like a GT3 bumper and some side skirting. minimalist is nice but I think the extra touches give more the appearance of the original concept car.
