Hey, if you're coming to Japan, you can find an old R32 GTS-T or GTS-T Type M for way less than 10 g's US. That's for sure! 80-about 91's aren't that expensive but parts can be.
If you really are coming here, let me know where you're going and I'll be able to give you a round about price of what you can expect to pay for a Skyline here.
I sell a host of Japanese spec parts from R32-34 GTR Turbines fuel pumps and brakes to S13 Fenders and dash units! At present time I'm testing the waters to see what parts will sell and what parts won't. If you have any questions, are interested and have ideas to share post a reply in the forum! If you'd like to know what I have at present or what I can get, email me at [email protected]