the little black boxes, do they have a sorta felty inside? because that would mean that the coins are 'proofs' meaning they were double minted for extra sharp lines and are worth more.
i found a list of approximate coin values:
1935 King George V $ ICCS MS-64.... C$100.00
1935 King George V $ EF/AU...........C$40.00
1935 King George V $ VF............. C$25.00
1936 VF/EF ..........................C$18.00
1936 EF..............................C$22.00
1937 King George VI PCGS MS64
golden brown toning, scarce grade ...$295.00
1937 AU+.............................C$29.00
1937 VF..............................C$12.00
1938 King George VI Voyageur reverse
ICCS MS62...........................C$180.00
1938 VF..............................C$50.00
1939 King George VI Parliament Buildings
VF/EF ................................C$9.50
ICCS MS-64 ................... C$110.00
1945 Good............................C$60.00
1945 VF cleaned.................... C$140.00
1945 NGC MS62.......................C$350.00
1946 VF............................. C$35.00
1946 PCGS MS62......................C$195.00
1947 Maple Leaf AU..................C$350.00
1947 Maple Leaf VF+.................C$180.00
1947 Blunt VF.......................C$150.00
1947 Blunt ICCS MS60................C$175.00
1947 Blunt ICCS MS62................C$225.00
1947 Pointed Fine...................C$100.00
1947 Pointed EF+....................C$175.00
1948 EF.............................C$800.00
1948 EF45.......................... C$850.00
1948 ICCS AU55....................C$1,000.00
1948 MS60 ........................C$1,100.00
1948 PCGS MS63 light toning ...wanted
1949 Ship EF.........................C$18.00
1949 Ship AU+........................C$35.00
1949 Ship MS63.......................C$45.00
1950 EF..............................C$15.00
1951 Arnprior ICCS MS62 ............C$225.00
1951 Arnprior ICCS MS63.............C$350.00
1951 Arnprior VF.......................45.00
1953 Queen Elizabeth II NSF VF........C$5.75
1953 SF VF............................C$5.75
1954 EF ............................ C$15.00
1955 EF ............................ C$15.00
1955 Arnprior with die break EF ....C$125.00
1955 Arnprior die break ICCS MS60...C$150.00
1956 VF..............................C$15.00
1956 NGC PL67 (Heavy Cameo) ........C$500.00
1956 ICCS PL65 Ultra Heavy Cameo ...C$650.00
1956 ICCS PL65 ......................C$90.00
1957 MS60.............................C$8.00
1958 Totem Pole proof-like...........C$40.00
1959 VF...............................C$5.50
1960 VF...............................C$5.50
1961 VF...............................C$5.50
1962 VF...............................C$5.50
1963 VF...............................C$5.50
1964 Charlottetown VF.................C$5.50
1965 Type 2 AU........................C$6.00
1965 Type V ICCS MS63................C$35.00
1965 Type V ICCS MS64...............C$145.00
1966 Large Beads AU...................C$6.00
1967 UNC ............................ C$6.00
vf - very fine, ef - extra fine, unc - uncirculated (that's what the proofs in the black boxes are - that's the best)
i don't know what the different types all are. do a google search on 'canadian silver dollar values' and you'll come up with all kinds of stuff.