Flash sales in django-oscar

[Artem Zyryanov]

Hi guys!
I am going to make an e-commerce web site with support of flash-sales.
Flash sale (in our viewing) is a kind of thing that works like this:
1. We offer customers to buy something from the defined set of goods (that are flash sale offer).
2. If customer is interested he adds some goods from this set to basket, makes an offer and pays for offered goods.
3. After some time we close the flash-sale offer, get offered goods from our suppliers and then deliver them to the customers.

How to make this thing work with Django Oscar? Should I write my own application and connect it to Oscar or it's better to customize something from Oscar to provide flash sales functionality? Or maybe there is anything that already have such functionality?

Thanks in advance!
Artem Zyryanov.