When assessing an artist's work, appraisers must look at sales of works by the same artist. Art gallery sales prices are private.
We must then go to auction sales prices which are public. When using comparable work by the same artist, medium, subject matter and size are factors to be considered.
Appraisers most often use price per square inch of previously sold comparable works by the same artist as a measure of value.
Using this method, I determined that the 2015 auctions of Georges Braque color lithographs
sold for $26.65 per square inch.
This results indicate your Birds in Flight 1962 original color lithograph would have an estimated auction value of $6,715.
This means the retail art gallery value would be $13,430.
A private seller to a dealer can expect 30-60% of retail value.
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