Duplicate Site

I need a quote for a client on how much it would be to duplicate a site like this [login to view URL] The client has some backend code form another site ( code for forum, profile page, submissions etc built on ruby on rails) so the chosen developer will have some code to work off of. I need the developer to look at this site in and out to give a accurate quote! Quote must also include coding html pages and plugging them up on the backend (built on ruby on rails) CLient looking for the cheapest quote but must be a good developer!! This company has about 3-4 of these sites for different things..client wants the designer to be able to sell all those categories in their profile... so basically they can sell flash items, vector items etc instead of making 4 different sites as this company did.