Display Ubercart sell price in Apache Solr search results
You can index it using solr's dynamic fields (see your schema.xml in the solr conf directory) and a custom module hook, namely hook_apachesolr_update_index(). 

Then you can, at search time, add the field you have indexed into the fields being fetched. For this you have three hooks or 'hooks' to choose from: hook_apachesolr_prepare_query(), hook_apachesolr_modify_query() and CALLER_finalize_query().

For further information on the hooks, see the README.txt in the apachesolr module directory.

Then in your search-result.tpl.php you'll have available the custom indexed field as $result['fields']['your_field_name'].