Amazon warehouse has two 20% off promotions available for this Used-Very good condition router which has 80% 5 star rating. It applied the 20% off twice to bring it from $75.78 down to $45.46 for me. You have to add it to your cart and go to check out. Some of the used ones are going for $80.24 and the double 20% still works. Goes for $109.99 brand new now on Amazon.
Update 8/23/17 Only 1 20% off promotion is working now.