Tire Products - Discount Tire Direct

Falken Ziex ZE-512 X4 shipped = $388
Falken Ziex ZE-912 X4 shipped = $396
Falken FK 452 X4 shipped = $448
Falken Azenis RT-615K X4 shipped = $644

so which tire is it? seriously, i'll pick them up tonight if you have RT615s