diff --git a/brmbar3/brmbar/Shop.py b/brmbar3/brmbar/Shop.py
index dd762c1..2c878b2 100644
--- a/brmbar3/brmbar/Shop.py
+++ b/brmbar3/brmbar/Shop.py
@@ -1,6 +1,8 @@
 import brmbar
 from .Currency import Currency
 from .Account import Account
+import logging
+logger = logging.getLogger(__name__)
 
 class Shop:
     """ BrmBar Shop
@@ -26,6 +28,8 @@ class Shop:
 
     def sell(self, item, user, amount = 1):
         # Call the stored procedure for the sale
+        logger.debug("sell: item.id=%s amount=%s user.id=%s self.currency.id=%s",
+                     item.id, amount, user.id, self.currency.id)
         cost = self.db.execute_and_fetch(
             "SELECT public.sell_item(%s, %s, %s, %s, %s)",
             [item.id, amount, user.id, self.currency.id,