i'm using Virtuemart 2.0.22a and Joomla 2.5.9 .
How to add duplicate product when a new product is added. Duplicate product will hold the product name, desc and other details except Id and Price.
Price for all Duplicate products will be the same.
For fast (more faster then manual method) adding you could use CSVI Improved.
In the backend? Select the product(s) using the tickbox and hit the Clone Product button. This duplicates all the product details but changes the alias as thaat is the only part than must be unique.