The first generation Panasonic 12-35mm F/2.8 O.I.S M43rds lens goes for $700 at authorized dealers that bundle it with free accessories, such as Adorama (filter kit, Corel, shade, tether, cleaner) or 4% promotional rewards (B&H Photo).
But if you are comfortable with imported grey-market (from the USA market perspective) purchased from a Canadian seller, Canadian seller QuickNDone (Ontario, 99.9%) is offering the new condition Panasonic 12-35mm F/2.8 O.I.S M43rds lens for $560 with free shipping. Limit five per customer. Note that this will ship from Ontario, Canada.
Note also that the second generation version of this lens goes for $1000 in new condition and it is expected to ship at the end of the month, with pre-orders accepted at B&H Photo and Adorama and Amazonia.