A website with all an artist's works. Like a personal gallery of the artist that I can shop from. It makes it easier because I know what I want.

A search website like DA or Etsy, where the stuff shown may not be everything an artist has. I have no idea what I want to buy until I see it and I usually buy from multiple artists.

Either is good. As long as it's clear and checkout is easy.

Neither. Let me tell you what's best...