The valuation of any item is subject to a variety of factors some of which appear universal and others which are unique to the product. This is true for investment grade postage stamps but, to make a ...

Stamp duty is the tax charged on property transactions. Threshold changes made last April mean many buyers now face higher bills, with some facing more than £11,000 extra.

Stamp grading is the art and science of evaluating a stamp’s condition, centering, and overall quality — and it can dramatically affect its value. From mint gum to perfect perforations, even subtle ...