Online art gallery website

Hi I am looking for an online start up art gallery website. - artist profile and picture with a brief bio - artist paintings to be uploaded - individual prices and paypal payment - ad on postage. - artists to be able to register, so we get an email that we have to get in touch with that artist and we can upload their paintings - also needs a twitter and facebook link too - we have a very tight budget on this project to start with, but once the website launches and takes of we will extend this and we will then give you the project as preferred supplier - we also would like an affiliate system in there. - a bit like these sites, but does not have to be as big as this to start with, but i would like to have the option to be able to extend the website if need be. example sites: - [login to view URL] - [login to view URL] (favorite) - [login to view URL] - [login to view URL] Please message me if you have maybe done a project similar to this in the past and could use that programming for this project to keep the costs as low as possible. We already have a domain for this too. I will allocate this project to the cheapest and experienced. I will need to see your portofolio.