diff --git a/classes/Env.class.php b/classes/Env.class.php
index b5ec987..33c3c5b 100644
--- a/classes/Env.class.php
+++ b/classes/Env.class.php
@@ -78,11 +78,12 @@ final class Env
     */
     static public function getBidCost($dis = 0)
     {
+        $cost = Load::model('Settings')->get('bid_base_price');
         if ($dis > 0 && $dis <= 100) {
-            return AUC_BID_COST - intval($dis);
+            return $cost - intval($dis);
         }
 
-        return AUC_BID_COST;
+        return $cost;
     }
 }
 ?>
\ No newline at end of file