As far as stand alone miniatures go, there are three new Easy To Build set - Primaris Marines, Primaris Marine Reivers, Death Guard and Pox Walkers. Check out the coloured sprues! Takes me back to the old games systems.
There's also a Death Guard paint set - but this is pretty crappy; little sample pot sized paints!? Have a look at almost any other manufacturer and they will give you standard sized paints in themed sets. Why would a Death Guard player even want to buy this? They wouldn't. GW should take the hit, sell this at a bundle deal price and include normal pot sizes. More people would buy it so it's hardly a loss!
In terms of game play, GW have released some Open Play cards. 48 cards split into 5 types to supposedly help you determine the deployment, objectives and special rules for Open Play games. Okay...
In non-miniature related releases, the Horus Heresy: Dark Compliance audio book is out and looks at a world under siege by the forces of the Warmaster. Could be super cool!
Well there's lots there for the bargain hunter to bite into, so go forth!