When complete and intact, these sell for about $100 US used, with the dies. There are several of these for sale in the City near me. A new (old stock) unit at my local Trading Post runs $185 in 45ACP.~Muir
50% new price marginally adjusted either way on condition...
It will depend on how complete it is after all buying any missing bits may bump up the cost, and also the calibres of the shell plates. I wouldn't expect the value to be much more than £25 to £30.
It's the calibre of the shooter that counts not the calibre of the rifle.
Cheers guys, will leave it in the cupboard then, may find a use for it one day.