Usually NZT260s near 100k mark has to undergo AC repair (only compressor or both the compressor and evaporator coil), shock replacement, Engine mount replacement. if these are done by the previous owner (with genuine parts) no headache for you.
As for the CVT, my allion is now at 80k and still running like brand new. So I think it has more life on it past the 100k mark.(At least for the vehicles which has been maintained properly with proper institutes).
Dont buy this G grade bullshit. Look for the options. Standard 260s come with blinker mirrors, smart keys, push start..blah..blah.... What i found different is some come with steering controls (Can be added later anyway), fog lights, rear and front parking sensors, auto or manual adjustable headlights and some even with VSC. (Might even find Cruise). (Car experts make corrections if Im wrong here).Try to get a 1.8 version as most of the options are factory fitted as opposed to 1.5s which might have been added later by makabases.
Good luck with car hunting.