On Front end you can check the working:

Deals can be seen on Daily deals view as follows

 

On the end of Virtuemart deal products can be seen on front page and category view of Virtuemart as

On products detail page the deal product will hold information of the deal as

 

In backend you can create deals and publish unpublish them:

Check the component

 

All deals view:

 

Options contain style parameters for frontend:

Create a new deal or edit