Application like Etsy

We are looking for existing or nearly completed multi-vendor/virtual application with functionality and features similar exactly like [login to view URL], with some more plus to be discussed upon bidding. We need a robust and secure system since it involves payments etc. It has to be multilingual. The only thing we will provide ourselves is content (FAQ, help guides, policy..etc NO NEED). Not to mention that we need to know what is the method you propose the integrity of the site you are building, will be checked with. Name it upon bidding. This would be a long term project, we believe as the website runs we constantly need regular maintenance or modifications according to the need. If you are interested please let us know if you have done similar projects.