Also, there could maybe be a sort of free thing for a beginner. A beginner who wants to commission a drawing, but doesn't have points yet. I'm not speaking for the artists here, but maybe there could be a free drawing for their first pokemon, then after that, they'd have to pay points for their drawings from then on.
With the points being paid; I think they should be a near equal amount. Because each artist has equivalent art to another on an unbiased scale. If one person had their prices too high, it might discourage buying. If they want to raise their prices because they in fact do have better art skill and cooler design, that would be their choice. But my base idea is for the prices to be the same so there's not discouragement for style. But also, there would be no restrictions on price either, so the artist can have flexibility (but not go too high to make someone choose others over them. But if someone wants to buy their art because they like it best, or if someone raises their price high for their commissioning, then that's the customers and artists decision.)