This note, dated 1979 lists for 50 in the new catalog.. but I paid 55 for it from a favorite, reliable dealer - I checked and they have no more of this type. There is another note offered on Ebay today that is dated 1966 and it is going for 65 - which is full catalog - but I've never bought from them.
I can understand your love of maps. I had to have this banknote because of the explorer and the maps... It goes well with my maps of Africa from 1897. I have one overall map of the whole continent and then four more that are more detailed sections of the Southern, Central, Northwest and Northeast areas.