If you are really serious about importing then do what I did and import direct from Japan cutting out the middleman dealers that charge a small fortune (around more 40-70%)! Japanese companies (for example showa trade) bid on Japanese auctions for you with literally 10,000’s of cars up for auction for every week .
By the way japimportsuk your “big street presence supra” is going for £ 2,147,483,647?
Need any advice feel free to email me
jzx90@go.com
Take care.