Directly from Peter Thomas Roth, DE-SPOT PLUS is on sale only for $38.88 (was $78), that is 50% off! Sephora is selling it for $78! This half off is way better than free samples!

Free shipping on order $50 + free samples at check out.

Also, try use code PTR2015 to get 20% off. I am not sure if you can use it on sale items. Just give it a try if you need to get something there!