Edited October 1, 2017
at 06:54 PM
has a 50% off offer, when you buy 2.
yubikeys that qualify for this promo: FIDO U2F security key, Yubikey 4 and Yubikey Neo (offer not valid on type C or nano versions).
This deal has been up for the last week and a half, and was posted on Yubico's facebook page. Currently stacks with free shipping offer, which also ends today 9-30-2017
Coupon Code: YK17SMART
Based on trying different combos in the cart, you must buy any 2 qualifying yubikeys, and you will get 50% off your order. If you have 3 or more qualifying keys in your cart, the discount will apply to the 2 highest cost keys.
I just picked up 2 security keys for $18, so not too shabby.
-edit- promo code was supposed to expire 9/30/2017, but as of 9.50pm 10/1/2017, it is still working. I've removed the expiration date from the title. hopefully more people can take advantage of it.