The Sigma 35mm f/1.4 DG HSM A1 ART lens is currently $120 off on eBay with free shipping (via 47th. Street Photo). The regular price of the lens is $899 and this is a new, not a refurbished product. Canon version is also available for the same price.
Sigma recently announced 4 years warranty on all of their products.
Update: they changed the price back to normal (cheap eBay trick).