Sorry, I have not been specific.
I want to sell a product (gift card), that someone can buy on my site, for example "hika shop", I list the gift card for 100.00 someone buys it and then can go to the "hika shop" store and use it.
Just like a home depo gift card or any other retail location gift card, or even a restaurant.
The transaction goes like this.
A user comes to my site, finds a restaurant that has an ad listed for gift certificates, the user clicks on it buys the gift certificate at my site, then the transaction happens in the background via the multiple vendor plugin, then the user goes to the restaurant and used the gift card at the restaurant.