I feel like this is a thing that isn’t said often enough, but if you see an artist underpricing their work, instead of lecturing them on pricing, buy some art from them and insist upon paying what you think it’s worth. It is far more encouraging as an artist to have someone say ‘your art is worth more and here is the money for it’ than to hear ‘your art is worth more and you’re hurting every other artist here and no I’m not going to actually buy art from you, raise your prices anyways’