diff --git a/rattail/importing/exporters.py b/rattail/importing/exporters.py
index a613c0069510b57e092dfa632ae3bc407e109187..0c3ea0541211f02b5ab0c7bd214e1f3433ebfac0 100644
--- a/rattail/importing/exporters.py
+++ b/rattail/importing/exporters.py
@@ -164,11 +164,16 @@ class ToCSV(ToFile):
     """
     Base class for importers which target CSV file on the local side.
     """
+    allow_delete = False
     empty_local_data = True
 
     def open_output_file(self):
-        self.output_file = open(self.output_file_path, 'wt', encoding='utf_8')
-        self.output_writer = csv.DictWriter(self.output_file, self.fields)
+        self.output_file = open(self.output_file_path, 'wt',
+                                encoding='utf_8')
+
+        self.output_writer = csv.DictWriter(self.output_file, self.fields,
+                                            quoting=csv.QUOTE_NONNUMERIC)
+
         self.write_output_header()
 
     def write_output_header(self):
@@ -197,6 +202,9 @@ class ToCSV(ToFile):
             if value is None:
                 value = ''
 
+            elif isinstance(value, (int, float)):
+                pass
+
             else:
                 value = str(value)
 
diff --git a/rattail/importing/rattail.py b/rattail/importing/rattail.py
index 140bc87f1f2c5244cf0484e5b23be2ae52b0c9ad..9994299c0b438f67d4cd9d6e72a1beff559a2d96 100644
--- a/rattail/importing/rattail.py
+++ b/rattail/importing/rattail.py
@@ -43,6 +43,7 @@ class FromRattailHandler(FromSQLAlchemyHandler):
     Base class for import handlers which target a Rattail database on the local side.
     """
     host_key = 'rattail'
+    host_title = "Rattail"
     generic_host_title = "Rattail"
 
     @property
diff --git a/rattail/products.py b/rattail/products.py
index 389665cc9ea0bd1bacd48c2ac8406ed3e81516f3..3702c5e68869682ae20dd51aef871ee5e3b47d17 100644
--- a/rattail/products.py
+++ b/rattail/products.py
@@ -766,6 +766,12 @@ class ProductsHandler(GenericHandler, MergeMixin):
         if upc:
             return pod.get_image_url(self.config, upc)
 
+    def get_last_sold(self, product, store=None, **kwargs):
+        """
+        Fetch the "last sold" date for the given product (and store).
+        """
+        raise NotImplementedError
+
     def render_product_key(self, product, **kwargs):
         """
         Render the key value for the given product, as human-readable