Spot on Nige!
The Tie 45 in your picture Patto is the same as the one I bought about 15 years back and that cost me £15 which was high money for a boot then. My mate got one with a stamped date on long after I got my (stampless) copy.
Daz is right, anything upto about £80 although I once saw one on ebay go through the roof, £1,000+.....listed as an original no less but definitely one of these!!!