Grip £200 to £350 at the moment depending on condition and if B1 or B2 – latter more desirable.
The hub of the Dowty test fan is an amazing affair – we had one at the museum – took about 6 blades IIRC!
Peter as an aside, are you doing the Spit, Merlin and RR day at Dux on 6th Aug? I have emailed saying I could bring a Spitty cockpit – nothing heard back yet