What website is the best for selling single handmade products?

Let me specify. My father is trying to turn his hobby into some profit. He hand makes products but they are 1 of 1s or at least rarely makes more than one of the same product due to the time it takes to make and the cost to make. We are looking for a website like Etsy or Shopify that could help him post these products and that could help him show that most of not all the products are 1 of 1s. One that could maybe have easy access for customers to communicate with him and pitch ideas and negotiate prices or even bid for these products. I’ve found that websites like Shopify are for sites to be made for products with large stock and for dropshipping from large external suppliers. (Unless I have just not found a option for a very limited and exclusive of stock in websites like Shopify) we have dabbled in Facebook marketplace and Facebook/instagram pages but wants to be more professional and have a website now that he is gaining more traffic to his business that he’s trying to pursue. Sorry if this doesn’t make sense I can specify more about what we are looking for if this confuses some of you.