I see those in carboots all the time, they usually go for about a quid or so unless you have something different.
Uniforms are good, as are animals, anyone who is of non European heritage or dead children.
Dead children are very sought after. Often when a child died the parents would dress them up and have their photograph taken.
The quality of the photograph is better than usual because the children are perfectly still, no blurred lines.
They are normally sat down with a soft toy or cushion, something like that.