Apart from anything else you're comparing apples to oranges. The only car really similar to the GTR is the TT Supra and you've said yourself they're sitting around 15-20k. Much like the GTR, why not jump up and down on supraforums?
You able to post a pic of it? R33 heater core may fit? If so I've got a second hand one I'll be letting go cheap soon or you can buy brand new ones on ebay from the UK.
Interesting, not sure who luke is though lol.
Nismo spark plugs I believe are exactly the same as one of the normal NGK's. They just have a different screen print.
Terry you looking to sell that lighter?
Nismo parts I have..
Nismo engine mounts
Nismo thermostat
Nismo versuspeed oil filters
Wouldn't mind a nismo cluster but I got my eye on another brand.
Mate if you think just that page is interesting check out the whole catalogue.
Series 1 options
http://www.r33gt-r.com/p/nissan-oem-catalog-1995-r33-skyline.html
Series 2 options
http://www.r33gt-r.com/p/nissan-oem-catalog-1996-r33-skyline.html