This e-mail is for a business that wants to advertise a temporary lower price as a way to bring more customers to the business.
Here's a silly question: would you like to pay less and get more? Of course you would. But that's not always possible when you're buying <product you sell>. The price always seems to rise, never to go down. Until now. For the next <length of promotion>, I've lowered the price of my entire line of <product you sell> in an effort to let everyone know how committed I am to being your <product you sell> source. In fact, I've lowered the price to the level it was back in <year of your discount price>! That's a price you won't find anywhere else in the country on this type of quality product, and it's only here at <company name>. Of course it's a gimmick. If doing anything to get you to come into <company name> and see the kind of excellent quality and service we provide is a gimmick, then I'm guilty as charged. But since there's no risk to you, only a great value, why not drop by and check it out for yourself? Just mention that you received this e-mail message, and you'll get the best price on <product you sell> you'll find anywhere. And once you buy from us and meet our great people, I think you'll come back again and again.