Definitely some good deals to be had. Now thru 2/28/14 http://hertzcarsales.com
is offering $1000 off any of their used cars for sale. Apply promotion code r2b021 and get another $300 off for a total savings of $1300.
As an example, a Nissan Rogue with 15K miles is listed at $19,786 Kelly Blue Book price. Hertz is selling it for $18,429. Using the discount and promo code the No haggle price drops to $17,129. That is a savings of $2,657 off KBB price.
I personally haven't bought one of these cars but know several people that have and were very satisfied. Searching the posts on SD's this is one of the better discounts they have offered. Good luck!