I bought my first 911, an 84 Targa, just a few years ago:
https://bringatrailer.com/listing/1984-porsche-911-carrera-targa-30/
I pulled the engine and transmission earlier this year and am working through several projects:
https://bringatrailer.com/listing/1984-porsche-911-carrera-targa-30/
Here are a few thoughts for you:
The highest priority for you is a pre-purchase inspection by a highly reputable shop. Post your location here and you will get suggestions on where to take it for the inspection.
For me, the only dealbreaker is rust. If the PPI finds any notable rust, the car is a hard pass. All other issues are acceptable at the right price.
In the PPI, after rust, the leak down test is probably the next most important, and after that the transmission tests. The transmission should not make excessive noise, and should upshift and downshift under heavy load through all gears.
If the car is relatively original, has no rust, hidden body damage or significant leaks and passes the leak down testing and transmission tests, and the wiring harness is not hacked to bits with modifications, then I'd be prepared to buy at a premium.
After all that, unless you are sure that the fuel lines have been replaced with ethanol compatible lines, I'd plan to pull the engine and replace all the fuel lines front to back as a first step after you buy it. A fuel leak could destroy the car the moment after you buy it. You can replace the AC lines, vacuum lines and address many other potential issues while you have the engine out.
If you confirm the above points that the bones of the car are in great shape, then buy it, address the key remaining issues and enjoy for many years to come.
Personal preference note: With such a great original color, I'd repaint to that Oak Green Metallic....after all the other issues above are sorted.
Keep us updated with your next steps.