Can anyone help please ... I have one of those scales described - "They are green on the main body, black base with a white surround on the top dial." I am not sure how old it is but probably at least 50 years. I am not based anywhere near Sheffield and the scales is in Ireland but wondered if anyone knew how much I could expect for one (I have been approached by someone who would like to purchase and know it is worth a bit but not sure how much) - can anyone help? Thanks