Is your product VITAL?
Is your product the FUTURE?
Is your product worth a LOT?
Can you generate $100M in revenue?
Can you be BETTER?
Can you be DIFFERENT?
If you have answered YES to ALL of those questions, then FORGET about the idea that you should decrease your prices!
You can still use sale as a short term trick to get rid of your old stocks but regarding your new product, make sure to keep the same price and add MORE VALUE focusing on showing the results of using this product!
Why be cheaper when you can be BETTER? and / or DIFFERENT?