2007 Low Mileage 26,850 $44,500
http://cgi.ebay.com/ebaymotors/Audi-RS4-RS4-2007-audi-rs-4-420-hp-6-speed-it-s-a-4-door-r-8-upgrade-that-
s-4-no-tax-/121118560699?pt=US_Cars_Trucks&hash=item1c333a91bb&vxp=mtr#ht_862wt_1165
2008 Low Mileage 34,800 $39,900 - BEST DEAL HERE
http://cgi.ebay.com/ebaymotors/Audi-RS4-Sedan-2008-audi-rs-4-quattro-6-speed-nav-heated-sts-xenons-shades-pdc-420-hp-19-whls-/290923869785?pt=US_Cars_Trucks&hash=item43bc69f659&vxp=mtr#ht_32688wt_1165
2008 Mid Mileage 55,000 $39,000
http://denver.craigslist.org/cto/3787594217.html
2007 High Mileage 85,200 $29,900
http://cgi.ebay.com/ebaymotors/Audi-RS4-Sedan-2007-audi-rs-4-quattro-6-speed-nav-pdc-heated-sts-shades-xenons-420-hp-19-whls-/380650497360?pt=US_Cars_Trucks&hash=item58a089a550&vxp=mtr#ht_31678wt_1165
2007 High Mileage 83,000 $34,995
http://phoenix.craigslist.org/evl/ctd/3866735906.html
2007 High Mileage 97,000 $29,950
http://phoenix.craigslist.org/evl/ctd/3827262838.html
Just to list a few