Ajax Vote Up/down
I have a deals/coupon website. I would like to add a vote up/down function for my coupons when users visit the store page. I would like it to be a clone of the way retailmenot.com has. When users vote up they will type the amount saved. After doing so the average amount saved will be calculated under the store description. There will be a percent rate also. When a coupon is voted down it will be moved to the bottom of the list.
If this can be done I am looking to add more functions such as a community similar to dealspl.us. I would also like to have maintenance done to it whenever needed.