I think your should be asking £5 for it - and I will pay you the full valuation price immediately if you decide to sell it to me
Apart from my (generous) offer, I have seen 162ie currently selling for £799-£899 and I would guess that a Titanium should be towards the higher end of that price range if it still has all the paperwork (handbook, test card and instructions for the digital manometers).
I foolishly sold my Titanium some time ago and it did not really fetch a significantly different price to the (late edition) standard 162ie that I sold soon afterwards.
Not everyone likes the digital manometers on the Titanium cylinders, but I liked them and hope to find another Titanium at some point in the future - mainly because I like the colour but appreciate that they are the same pistol as the late version 162ie that I am currently enjoying shooting.
Hope this helps - but I won't hold my breath while you consider my first offer
Bob.