Very very hard to find cars in good condition in Japan, I spent 3 months getting the one Ive got now. Out of a few hundred Skylines for auction each week only a handful are R32 GT-Rs in the right years, even less are non accident or r grade, and even fewer have low ks and less are something special.
It will take some time to filter to the local market due to the amount already here and for sale, but proper cars in good condition will appreciate in value, even a base model in my opinion, but moreso V specs, N1s, Nismos and Aus delivered.