To me this stamp sheet has no value because of smaller countries like Nicaragua and other African countries outsource there stamp printing and this printer will take advantage from us by printing wide varieties for us such as overprint, error etc and try to sell it at as rare for very high price.
This Nicaragua Einstein stamp with Taj Mahal stamp, United Nations UNICEF stamp, Olympic stamp, Physics stamps, E=mc2 stamp was sold for $1 also. Click following link to read it.
Gandhi stamps Club.
Article comes under : nicaragua stamps, einstein stamp, taj mahal stamp, nicaragua gandhi stamp, nicaragua physics stamps,Nicaragua Stamps : Gandhi Stamp - Einstein Stamp - Olympic Stamp - UNICEF Stamp ERROR stamp