Evening Colin, late to read this post but welcome anyway
Francis Barnetts, my late father and I restored a 1956 Falcon 74 way back in the early 1980's, that had a 197cc Villiers 8E in it and although
only a three speeder it used to get along the road fine...
vegikev, who is on here every so often, is into his Hayters, he may be able to help with any queries you may have, as to value like most
of this machinery its only worth what someone else will pay for it !!
£695 for the one you mentioned does sound a bit steep
Hope all your "for sales" find new homes
Paul