Thumb Score: +21

Woot! [woot.com] has Samsung P9 microSD Express Memory Card: 512GB for $89.99.
Shipping is free for Amazon Prime Members (must login with your Amazon account and select a shipping address in order for Woot to apply free shipping) or is otherwise $6 per order.

Price:
$110.01 lower (55% savings) than the reference price of $200