Custom Query issue

I’m working on a custom query function to search in my WP database for meta values of certain values. I haven’t had any problems with any of my other meta values and searching for them, only my price meta. When I run the code in phpmyadmin on the database, I receive the results I expect (two posts that match my query), but when I run it in my template, I receive no results. I’m wondering if there is something about my query that WP is rejecting or filtering out. Here is the query:

SELECT ID
FROM $wpdb->posts
LEFT JOIN $wpdb->postmeta ON ( $wpdb->posts.ID = $wpdb->postmeta.post_id )
LEFT JOIN $wpdb->term_relationships ON ( $wpdb->posts.ID = $wpdb->term_relationships.object_id )
LEFT JOIN $wpdb->term_taxonomy ON ( $wpdb->term_relationships.term_taxonomy_id = $wpdb->term_taxonomy.term_taxonomy_id )
WHERE $wpdb->term_taxonomy.term_id =6
AND $wpdb->term_taxonomy.taxonomy = 'category'
AND $wpdb->posts.post_status = 'publish'
AND $wpdb->postmeta.meta_key = 'SUMMER-PRICE'
AND $wpdb->postmeta.meta_value >= CAST( 1000 AS SIGNED )
AND $wpdb->postmeta.meta_value <= CAST( 15000 AS SIGNED )
LIMIT 0 , 30

Any help would be greatly appreciated.