I just got a mid-size for $17.07 a day from www.hotwire.com which is a much cheaper rate than any other place that I tried. Even Priceline rejected my $17/day bid. What's nice about hotwire.com is they give you the full cost, including all taxes, before you commit, unlike Priceline when you find out afterwards that taxes are high, and Hotwire doesn't charge any fee for the service.