diff --git a/scrython/cards/cards_object.py b/scrython/cards/cards_object.py
index 38dac2b..71896c8 100644
--- a/scrython/cards/cards_object.py
+++ b/scrython/cards/cards_object.py
@@ -475,9 +475,9 @@ class CardsObject(FoundationObject):
         if mode not in modes:
             raise KeyError("{} is not a key.".format(mode))
 
-        super(CardsObject, self)._checkForKey(mode)
+        super(CardsObject, self)._checkForKey('prices', mode)
 
-        return self.scryfallJson[mode]
+        return self.scryfallJson['prices'][mode]
 
     def related_uris(self):
         """A dictionary of related websites for this card
diff --git a/scrython/foundation.py b/scrython/foundation.py
index 9b984a6..0b4a2b7 100644
--- a/scrython/foundation.py
+++ b/scrython/foundation.py
@@ -30,7 +30,7 @@ class FoundationObject(object):
         if self.scryfallJson['object'] == 'error':
             raise Exception(self.scryfallJson['details'])
 
-    def _checkForKey(self, key):
+    def _checkForKey(self, key, nested_key=None):
         """Checks for a key in the scryfallJson object.
         This function should be considered private, and
         should not be accessed in production.
@@ -44,6 +44,11 @@ class FoundationObject(object):
         if not key in self.scryfallJson:
             raise KeyError('This card has no key \'{}\''.format(key))
 
+        if nested_key:
+            if not nested_key in self.scryfallJson[key]:
+                raise KeyError('This card has no key \'{}.{}\''.format(key, nested_key))
+
+
     def _checkForTupleKey(self, parent, num, key):
         """Checks for a key of an object in an array.
         This function should be considered private, and