Well the price on them depends on what someone is willing to pay ever dealer or individual collector will offer you different prices for them most dealers will want to buy for silver.
Difficult to ascertain market pricing for its all about the "GRADE" of each coin. Can not tell from the photos. However, using wholesales prices ( grey sheets), the Mercurys graded as G good- the lowest grade, each coin would be worth about $2.00 each, except special coins--1916 D= $650.00, 1921 P=$36.00 and 1921D =36.00. Now, if the grades are XF , the coin range would be from $8.00 to $38.00. Again the exceptions are significant, 1916 D = $5,300.00; 1921 P =$410.00 and 1921D =$520.00; 1925 D =$100.00; 1926 S=$190.00; and 1927 D =$70.00. You could take the book into a reputable coin dealer, and ask for a quick appraisal to Ballpark pricing. You could indicate that you might want to sell them in the near future. You could ask for a closer look at the specially dated coins for that is where all the $$$ are. The Dealer can take out his glass, and run thru the coins in 10 minutes or so. Good Luck
I've seen circulated sets offered for $350 without the 16-D. Don't know if they sold for that but that was the asking price.
