Building an extension to buy sale items from ecommerce

I want a chrome and Mozilla extension like price tracker and flash sale buy which will allow people to buy items which are in limited sale time appr. in 30 sec .The developer should make a new rather taking source from the similar ones. I want the extension like price tracker which will guarantee the user that product will be added in their cart. In those extension , I can change the item name and link by adding my affli. ID . This project is offered to the right person , let's meet in msg. My budget is in between 3000 rupees and additional 2000 will be awarded on completing what exactly what I need in it .