Dear Syrichas,

Thank you for your help and patience. My sincere apologies for the delay with the appraisal.

The presented object appears to be a painting made in oil paint on canvas with the measurements of 22 x 35 cm. The painting depicts a landscape with a windmill. The artwork is signed in the lower-left corner "D´apres A. Priestman, P. Yallourakis". This means this painting is a copy of a painting by Priestman by the artist Yallourakis. 
Sadly no additional information for an artist with this name fitting in style and motif is given by reference books and databases. 
Comparable objects were recently offered and sold on the international auction market. 
This piece is in good condition and there is no serious damage visible in the images provided.
A fair market estimation would be between 150 to 300 USD.
This estimate is based on actual recent past recorded auction sales of comparable items. Retail "asking prices" can be higher and may vary.

With kind regards, 

George