H gailey painting value

I bought this beautiful painting for £10, I think it is NOT an oil painting - some other kind of paint, although it is on a canvas.

23" x 19". It needs a bit of a clean (not sure the best way to do that).

H gailzy

The splashing wave detail is very clever as are the lighting effects. I have read in various places on the internet that H. GAILEY paintings were mass produced copies from a factory in Hong Kong - 10, a month and that is why they are so common.

I do not know if there really was an artist H. GAILEY but if there was or is, then the fact that they were attractive enough to mass copy, must make an original quite valuable. A useful painting for interior design - instant blue colour (color).