Can I search for all BMW 5series cars that fall under the great price category all over the US?

Try Craiglist.com Or Angieslist.com

When using GuRu or any other searching site. Make sure you adjust your search radius to the maximum allowed by the site. You can also look up and use zip codes to target certain areas. Remember that certian areas of the country like extreme Northern and Southern regions typically are harder on vehicles than other areas. Be sure to stay away from areas that had floods or hurricanes if the vehicles history report shows it was present at that date!