Sorry, I just posted the SQL part of the statement. You need to assign it to $query like this:
Code:
$query = "SELECT $sql_tbl[products].*, (SELECT MIN($sql_tbl[pricing].price) FROM $sql_tbl[pricing] WHERE $sql_tbl[pricing].productid=$sql_tbl[products].productid AND $sql_tbl[pricing].quantity=1 AND $sql_tbl[pricing].variantid = 0) AS price FROM $sql_tbl[products],$sql_tbl[pricing] WHERE forsale='Y' AND avail>0 ORDER BY RAND() LIMIT 6 ";