I make some very tiny paintings for auction on eBay under my eBay store prattcreekart. I've been selling little paintings at auction for the last ten years. The highest prices one went over over $100 to a lady in Germany and another lady here in the midwest, USA.
You can link to my eBay shop here.
If you are interested in marketing at all, I review an article in HBR (Harvard Business Review) 10 Must Reads 2018's bonus article "Customer Loyalty is Overrated".
Currently painting these lovely lilacs. One of my favorite spring flowers that grows on bushes and shrubs. I love to make bouquets with them. I am currently working on an oil painting of this photo. I also recently finished a watercolor painting of lilacs here: