It looks like you may be able to preorder the brand new Sigma 14-24mm f/2.8 DG HSM Art series lens tomorrow if the latest rumors are true.
Nokishita reports that preorders start February 23, 2018 and the lens will begin shipping on March 9, 2018 at a price of 164,700yen (including taxes). If I had to guess using the usual yen to USD ratio, that would put the new Sigma at about
$1399 $1299 USD.
In case you missed it, check out the Sigma 14-24mm f/2.8 DG HSM Art series lens here.