User interface design + Website design

I want to build an ecommerce platform for multiple sellers and buyers for a specific kind of luxury product.

I'm looking for a UI designer to make a complicated product search form more user friendly (this is the most important part of the project) and design a 4 user friendly pages for the website.

So this project is also to design 4 pages for my website:
- Homepage
- Product category page including product filters
- Product page
- Search page with complicated search form


Please quote your best price for the whole project (no hourly rates). If you can't provide examples of your previous work, do not apply. Also, I need delivery of everything in max 48 hours.