Thanks for your advice guys. Lansyp luckily I can read Norwegian but hadn't seen this website. It's a Norwegian auction house in Oslo and the painting shown there is nicer than my mums but it sold for £8000!
Granny, I had seen that American website and thought that if I could find the right venue, I might be able to get a couple of hundred for it. I'm just stumped at how to get the right person interested. I think you are right, I need to do a bit more research and maybe think about taking it over to Norway to get the best price.