Only Frontend wanted. Backend and real data are ready and working well.
Also I will provide you with good working c# .net project. The project is desktop version of the website.
So you can have the c# project and see its code and see how it works then make its website version.
In brief, there will be an input textbox, person types product name, clicks search button, results come out, user clicks an item from the results then seller's phone address comes up.
Design must be light, plain, white like google.
Loading speed is top priority. Then, any screen (laptop, phone, etc.) friendly also priority.
I will provide good explanation.