Question for The Dawson Gallery

Hi are you guys still open if not i have one off your pictures painted by K.Bowman it is a landscape with a mountain and trees and a river it also has a orange sticker on the back with ********/87 and a big 33 on the big it was owned by Mr Clarry Bird of wanganui he has gifted it to my self as i was his carer for three years i would like to know if its worth anything so i can put it on my insurance.