Ranking high # series by degree of difficulty (and why?)

[glynparson]

1970 and 1972 are not difficult at all in my honest opinion they have no business being in the top group. i understand the book price is higher on them but they aren't tough at all to find even if adjusting for condition. Some of the tougher 71 high number s are far tougher then the 1970 or 1972 or even the easier 66 and 67 high numbers. Not sure i agree with your the list. Here is my list and experiences from selling vintage topps cards for the last 40 years include working for arguably the leading vintage topps dealer in the country for about 10 years back in the 90s early 2000s.

Tougher :
1952
1953
1966 (the tough ones)
1967 (the tough ones)

Next:
1955
1961
1962
1971

third:
1957
1962 (the sp)
1964
1965 (SPs)
1970
1972

THe Rest:
Now i considered 1963 in the third group and wouldn't argue if someone put it there. The rest there isn't much or a very slight difference. occasionally there may be a slightly tougher card or two like the 1973 high nuber checklist but overall they aren't very tough.