30-35% Under MSRP... No surprise
If you look at any of Sigma's products with a little math you can see that the "Street Price" is always 30-35% less than MSRP. The Street Price is still ludicrous, and not in budget for most current Sigma system users.... not even close.
Still For that price it better be in a kit with 10mm f/2.8, 30mm f1.4, 50mm f/1.4 85mm f/1.4 150mm f/2.8 OS a battery grip, and a EF DG 610 Super Flash They could call it the PRIME SD1 KIT. Then and only then it may be worth it.