Who is the author of the picture
 

A small picture of the author Ekhort?
How much could it cost?

Ekgorst Basil E..

Basil E. EKGORST 1831 - 1901
  Vasiliy Efimovich EKHORST
Russian painter, landscape, animal painter. He studied at the St. Petersburg Academy of Arts. In 1857 received a second silver medal in 1860 was awarded the title of class artist and the first silver medal. Participated in exhibitions of Arts, The Islands of exhibitions of works of art (1877, 1879; 1880), the Philadelphia International Exhibition (1876) and others worked in the academic direction, writing genre paintings in the style of "folk scene".

Most likely the author - Ekgorst Basil E. (1831-1901).

And the size can be found?
(Affects price)

The picture on the board

OK, and a board of size?

Size unframed 18 x 21 cm

Correct to write: 21 x 18 cm

Work Ekgorsta auctions sometimes occur, albeit infrequently. Artist he so-so. Similar to your work sold in December 2009 at Bukovskis (board, oil, 22.5h17.5 cm) with the estimate of 1000-1200 euros and was not sold.
To date, for your work can be given in the 1000 U.S.

I agree with the opinion of the distinguished SergeiSK.

(However, I would be deducted from the price of the cost of services restorer)