lens for $348 at Cameta Camera via Rakuten.com with coupon code SAVE15. 14 left in stock as of this posting. Coupon code expires after May 29, 2018.
Originally $398 - $50 (coupon code SAVE15) = $348
Free shipping. No sales tax if outside of NY and CA.
5% cash back if you use PayPal on Chase Freedom this quarter = $17.40
2% cash back on popular cash back websites = $6.96
Price after cash back = $348 - $24.36 = $323.64
I'm sure other lens deals can be found via Rakuten, to use with this coupon code. The SEL35F18 was just the particular lens I was looking for. It seems that Sony lenses are very rarely on sale, and they are usually excluded from coupon codes like this. I've never seen this particular lens below $398.