They don't come with tyres because they are still brand new and individually boxed (2 of the boxes are still unopened, 2 opened for photos and inspection only)
You are more than welcome to buy it from Japan if you can work around the import tax/duty and put up with the waiting period for these wheels.
Goods above AUD$1000 are subjected to import duties/taxes, and they will add the goods up together even if you send them seperately (again, more money for shipping)
And RAYS website in Japan still priced them at around AUD$780 - $800 (as of today's currency exchange) each before shipping.
Locally, they sell anywhere from $3600 - $3720 for a set.
And my prices are negotiable.