Dear …
As our valued customer, we are writing to let you know about a new __(service/product)__ that we are now offering. We are very excited to introduce this new __(service/product)__ to our customers and we hope that you will also see how it can benefit you.
Maybe you`ve tried this type of __(service/product)__ before and found that it wasn`t quite what you had expected. We believe that you will feel comfortable using our new __(service/product)__ because __(give a reason why yours is different)__. We are thrilled to be able to extend a special offer to you, inviting you to give it a try.
If you contact us before __(date)__ and mention this letter, we`ll be happy to give you __($ xxx or xxx %)__ off the normal price of __($___)__. We do not generally give discounts on our __(service/products)__, however, as such a valued customer, it is our sincere way of thanking you for your past patronage by extending this special invitation to you.
As mentioned, we do not generally give special discounts on our __(service/products)__ and have only done so with a select few of our valuable customers with this new __(service/product)__. In view of this, we ask you to please be discreet when you visit __(office/store)__ regarding this special offer, so that we may avoid offending or hurting our other customers.
Please feel free to contact us for any additional information. We`d be happy to answer any questions you may have. Thank you for allowing us to continue to serve you. We look forward to seeing you again soon.
Sincerely,