Fujitsubo are a well-established, classic-car sales yard in Fukuoka city. There are plenty of old-school cars for sale including Skylines & Celicas. On-site is a small but impressive automobile museum which is free to enter. There's even a Toyota 2000GT and a GT-R Hakosuka Skyline on show. Now, that's value that can't be beaten.
5 minute walk from Kadomatsu Station (Sasaguri Line)