Thanks guys. Boots, the gumtree pin is the one that made me ask. I would one day love a CV - but it is my grail pin & I want it in grail pin condition. For me this means either excellent original or professionally restored. This particular one is too rich (for me anyway) but I wondered what the realistic price is. If this sells near the asking price then I'm in for a lot of $ if I ever get one. For high-end pins I've come to the conclusion it's better to buy them already restored.
Pinsanity, thanks - I think you are correct.
