How much is a "Yehudi Menuhin,Mozart,violin concertos Nos4&6,Bath Festival Orchestra" worth.?

i've been looking for days with no joy.can't even find the album cover.both 4&6 are in D major.it's 1963 HMV pressing where the gogs got his(or her)head in the funnel of the old gramophone.any help will be greatly appreciated.Cheers Deck.