No they don't - as part of Nissan's official turning ghey process, they dropped the 450GT and released a 370GT Hybrid. They run 2.5 or 3.7 VQ motors, same as the V36.
If you wanted the current shape, I doubt you'd see change out of $50K, that's without looking too closely at values though.
See above regarding the M45, although the Fuga gets the VK56 in the US so fingers crossed we get it too. No V8 on the Japanese market means problems for importing them.
Edit: Just checked Infiniti UK - no V8 being sold there either, so they may not have engineered the VK56 for RHD markets, which would explain why they're not on the list to be sold here in the short term.
When I listed the original Fuga on SEVS, it didn't make financial sense at the time, but it makes VERY good sense now. If Infiniti bring out the M here officially, it will also make good sense if they can be imported for half the price Infiniti are charging
Maybe a little less - think BMW 5 series prices.
They will be eligible up until they're sold here locally. Same with the G series - the V36 Skylines will be eligible until the Infiniti G is released, bringing a very long era to an end for Skyline imports.
See above.
^^^Completely correct. Australia is an irrelevance in most cases for Nissan Japan. Our ADRs are a real pain in the arse, which is the reason why manufacturers have been pushing so hard for us to align our rules to Europe. Making a unique spec for such a small market is a right pain in the arse for manufacturers.