He only made 7 feature films in his rather short life, all of them are fantastic. I think Sacrifice and Nostalghia are great, but one of the greatest films ever made about the process of art, one the great parables of the artist, can be found in Andrei Rublev.
If you are an artist or creative of any kind it's worth reading Sculpting in Time. That book is like a bible to me.
I followed the poeStore link and did a search for his movies and found a box set, which was exciting, but it's Australian regioned, so it comes with deadly spiders or something.