http://www.mahoodsculpture.com/horse-sculpture-in-dallas/

Is an original painting of a parrot by Dimitri Vail worth anything?
Dimitri Vail was a Dallas artist who painted portraits only. A snow owl & a horse are the only other ones I know of. He became noted when he painted the stars performing at Radio City Music Hall many years ago. I became acquainted with him when I took lessons from him. I am a sculptor & he wanted to do a project with me, he was to paint a picture & I was to do a sculpture of his painting. This is how I came by this painting. When the deal with the promo. people fell through he told me to keep the painting as I had spent many hours on the project.As far as I know those three paintings were his only departures from portraits. My painting was done in the early 80′s when he was almost blind.
Follow this link and try contacting this woman named Alice Berkman. I have a strong feeling she will be able to help you. In fact, it wouldn’t surprise me if you already know her.
http://www.fineartshack.com/links12.shtml
And this next link will provide you with some prices paid for some of his paintings sold.
http://www.askart.com/askart/artist.aspx?artist=11147142
Mustangs of Las Colinas