Thank you for your advice . In fact I have already started a gallery on Artscad-but I was discouraged by the site slowness and that i could not find any information about the owners of the site in the"about us " section ".

How much can be the cost of having my own website ? Do you also spend money on advertising?
You know the good thing about art.com was- that it has 5 million visitors each month -and my gallery got a fare share of that without having to pay for anything .