Good day my name is*****
I am a Certified IRS Qualified Fine and Decorative Art Appraiser. It will be a pleasure to put my expertise, libraries, resources, and experience in the field to work for you.
As Nora has pointed out there is no auction history for the work of:
Petar Hadzi Boskov
Born: June 1, 1928
Died: March 22, 2015
The main reason is that none have been offered for auction. This does not mean that his work has no value or potential value.
As appraisers we base our opinion on sales records or sales offerings.
What you need to do is to approach the auction houses to get their opinion on the possible value of you grouping.
Here are the contacts for several auction houses:
Martha Baer *****@******.***
Post-War & Contemporary Art
New York, Rockefeller Center
Edouard Benveniste *****@******.***
Post-War & Contemporary Art New York, Rockefeller Center
Sotheby's New York
You need to give them a call and ask for some one in their Post-war contemporary art department.
I hope this helps to move you forward. If you need any further assistance please ask.