I booked an intermediate (with Emerald Club service) at National Rental for Friday November 25 through December 2 back in January and I got $170. total including all taxes and fees with a contract discount and the $20 coupon with the Entertainment book.
I check on it from time to time, especially when I see threads on other people's rates going down. Finally on March 23, it went down even more and I re-booked it at $149. total for the 8 days. Of course, it's again VERY high.
My advice is to book something now and then check the rates daily and if it does go down, book it and cancel the older one.