What are five basic principles of selling?

[vatsallya-lamgadey-926c32c9 (Vatsallya Lamgadey)]

Five basic principle of selling are:

1. Selling is all about relationships.
2. The sale is not about your product, but their problem.
3. Price and value go hand in hand.
4. There is no sale unless you can close it.
5. Those who listen, win.