How manually score my products and sort my products by their score?

[DesignGen]

Currently the products on my collections page look like this:

Since my products are actually deals for my members I want to:

• Manually give each deal a score
• Display the deal score on the product
• Sort the products by the deal score

See the below mockup for what I want to acomplish:

Please let me know if you have any advice on how to accomplish this in a simple way. Open to hiring for this quick project for a small price.

[Guleria]

Possible in both way custom code and using an app.
App you can check here.