Fountain pen calligraphy nibs

Looking for value of those old calligraphy nibs: 8 from Blanzy Poure & Cie; 1 from J. L. Isaacs; 1 from Soennecken with original box.
The Blanzys are in numbers 1, 1-1/2, 2, 2-1/2, 3, 3-1/2, 4-1/2, and 6.
The Isaacs is aluminum and stamped No. 1.
The Soennecken is No. 68.