Weekly Deals from Google Play store
There might be repeat deals and may (or may not be) price matched for the Kindle.
Some books that caught my eye that I don't think has been discounted before:
Destiny's Embrace - Beverly Jenkins (I think this was a Smart Bitch Sarah's Book Club pick a while back). It's even cheaper at $0.99.
$3.79
Mystical Warrior by Janet Chapman
Duke of Shadows by Meredith Duran
Velvet Promise by Jude Deveraux