I've been selling art online for about 15 years already. In the beginning I did it mostly by eBay. Now there are really many website and portals to sell/buy art online. Even Amazon opened to art galleries a couple of years ago.

The development of online Art market is monitored by Hiscox in its annual report.

Good informations about it are also available on ArtPrice, but its data are not for free. (Btw, I think Artprice is using a blockchain to collect and share informations about artworks: that was what they announced more than a years ago, but I don't know if that project is still running. Well, it could be useful to find informations about the property and the price of an artwork on a free blockchain.)

Anyway. As an artist, I tried a lot of those websites but at the end it seems to me that the best working are Artfinder and SaatchiArt - well, in my experience at least. I sold some artworks on that platforms.

Here are some of my artwork for sale on SaatchiArt:

The living city

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We'll find a way

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Puzzled city inside

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Fire