Bring them in step by step. Instead of focusing on only one feature of the commodity, discuss all of the advantages.
You can increase the value of a product in many ways when creating a sales copy. By users seeing that the product comes with a free bonus this is one way to increase its value. Let's face it, we all like having a free gift. People like things which are cheap but effective. With the help of a few bonuses with your product you can effectively give the customer the impression that your product is very valuable. There are reports of customers buying products just to access the bonuses on offer.
Taken from: https://unsplash.com/photos/BoYnwJ8lM54
Yes, it can be that powerful. However, the type of bonuses you offer will have an impact on your success. The bonuses included must be exclusive and complimenting to the product in order to see the best results. It is not wise to have a bonus just for fun.
There's always been a debate about whether short copy is better than long copy or vice versa. While it's completely up to you to choose the length of the copy, research shows that long copy always outperforms the short copy. This is mainly because people want a lot of information before they buy a product. But a short copy can be good for those individuals who don't want to go through the hassle.
All in all do not let the golden opportunity slip away. Take time to write good quality sales copy and you'll be rewarded with a boost in profits. This is how business works.