Multiple Price For A Same Product

Hi,

We are running a city portal where anyone can sell or buy things like, property, auto, Laptops, and mobiles.

We are using default wordpress Post to manage the things, not using any cart or other plugin.

Everything seems to fine with auto and property and used things, But we need something different for New items

We just want that we create a single post for Samsung Galaxy S4, where we can put all the details specs and pictures.

So now any user who is Selling the Galaxy S4 can list their price.

But i don’t want to create a separate post and then bound them with a tag to show the price.

I need a simple solution where a user can add his price and it will show with the original post.

Store One Price – $450
Store Two Price – $430
Store Three Price – $460

Please Suggest me any plugin or think which can do or any other way to achieve it.

Thanks