I always imagine the clever clogs of Winchester chuckle to themselves when they read "Lectori Salutem. Habetis bona deum" and think "How apt!"
I think it means - Greetings Reader. Have a nice day! But you have to be clever to know that - and if you are not then please don't enter this shop! I'm sure Carpet Right have a similar latin slogan something like "insumptuosus vestis" - How apt...!