Can't find anything about a "Germany East" brand in the blue book... I'm guessing that isn't really a brand but just a generic "made in" sticker.
Similar vintage made in Japan / Europe generic classical guitars in this condition sell for around $50-$250. If I had to guess at yours specifically I would probably list it at $150 and go from there.
This one is a 60's made in germany Hopf and they are asking $300
https://reverb.com/item/75460-hopf-clas ... 60-natural1972 Yamaha for around $250 shipped
https://reverb.com/item/314227-1972-yam ... -conditionYou can get this '67 gibson classical for around $400
https://reverb.com/item/242891-1967-bra ... video-demoMost player grade classicals just aren't worth that much.