A friend's father brought home to Canada about 50 sheets of mint stamps, 50 stamps per sheet, from Holland after the war. These include Scott # 245-261, 217, 266 and 277. The individual single MNH stamps are all common with so many printed and valued at 25 cents each in Scott. How are mint sheets valued for the Netherlands in this era? I can find nothing in Scott or online about this. I know some collectors specialize in this area so would appreciate your feedback so I can advise the owner. Many thanks! Apologies for the poor quality photo of a corner of one sheet taken to ID his stamps.