I bought my GTR interstate for extremely cheap without even getting it inspected, but I had the advantage of knowing the engine was already stuffed, so as long as the bodywork and drivetrain checked out well then I was going to be fine
There are bargains out there and rip offs regardless of the price tag and looking at an online ad won't show much to us apart from obvious things like different coloured panels or clean engine bays and interiors. But yes, sometimes that's all you have to go off before going to the next level which is getting someone like stateroads or from the forums who knows GTRs to check it out (offer beer and money for them to take a look).
In those photos it looks clean enough for the money but the difference between a 16k 33 GTR and a 26K 33 GTR can be totally made up in the engine health and modifications alone. But looking interstate is taking a step in the right direction, because the best car for you is unlikely to fall within your state with base odds at 1 in 8!
Also +1 for GTS-Ts - easily modded to be faster than GTRs for cheaper and are more reliable and less costly to repair. But you can't seem to stop people set on GTRs so no point beating that dead horse.
Also +1 for GTRs being money pits - you are gonna want to love the car because once you start modifying it will spend more time off the road than on. GTR and GTS-T life is polar opposite lol
Good luck with your search either way and my number 1 advice is to be patient - you might have the money and desire to buy one now, but that doesn't mean a good one will necessarily be available to you. Some people search the market for months even years, others get lucky and find straight up or like me...weren't even planning on buying one but come across an offer too good to refuse!
Good luck