TOPIC:

I apologize if I open this discussion here, but I did not know where to do so.
I would like to make a suggestion to the developer plugin virtuemart to create a new plugin or component.
It would be nice to have a new feature in virtuemart have dedicated customers who have bought the sites made ​​with virtuemart 2.
Create a function of the cash account.
Let me explain:
A customer buys 10 products for a total of $ 50.
The retailer receives the order and note that of these 10 products 1 is no longer in stock.
The product is no longer available costs $ 5.
Then the dealer puts that $ 5 per account.
The client when he enters into his account page will get a credit of $ 5 you can spend on a second order.
Here's an example:
The customer buys the second row for a total of $ 55 inserts his credit via a small button placed in the basket and his new total amount payable will be $ 50 while the total invoice amount will remain $ 55.

I hope that was clear and that you take into account the future development of such a function.

Dear antonio,
Thanks for the suggestion. I think the coupon feature of VirtueMart already solves exacly what you want. If a product is not available, you can simply create a coupon of $5 and send the customer the coupon code. When the user enters that code on the next order, the $5 will be subtracted and only $50 will be charged.