Where are you getting this 400$ msrp? Their own website lists it as 149, with 2 extra (for a total of 3) batteries, usb charger and 8 extra (total 16?) props just 26$ more. So unless you're sending out or 3 drones per order, I'm not sure where your msrp is coming from.
https://www.hubsanus.com/index.php//shop/h502s.html
SvHDMassdrop's silence on this matter is kind of disturbing, especially given all I got from the support ticket was a canned spiel about what msrp stands for. I'll join the drop since Massdrop has done right by me thus far. I figure it's a 50/50 chance that there's more to the drop than there appears, or it's an honest mistake. I'd hate to find out otherwise.