I'm pretty sure all of the $400 coupons expired on June 27th  

$1450?... I don't know if I'd trust a seller without any feedback yet. I can discount by $110 though now! New price is $1529.99. I also have a bunch of single batch #1 S3s for sale (and 2-packs), but I would recommend buying directly from Bitmain (minimum order of 2) if you have the bitcoin since they're cheaper than I can offer when accounting for Amazon fees.