That's pretty bad. My favourite "worst shop sign apostrophe" of all time goes to a pub called Monroe's in Bridgend in South Wales that had a sign saying, "Wale's favourite pub". They also tied in the Monroe theme by offering "Some like it hot and cold platter."
Now this is a good thread.
Campaign to get Bubbles to change their sign
and
The worst punctuation on signs in the world....ever!