| Month | Year | Condition | Price | |
 | Jun | 1971 | Fair | $8.36 |
 | Aug | 1971 | Very Good | $16.52 |
 | Aug | 1971 | Good | $13.32 |
 | Sep | 1971 | Good | $9.50 |
 | Oct | 1971 | Good | $11.14 |
 | Oct | 1971 | Good | $11.14 |
 | Nov | 1971 | Good | $13.07 |
 | Nov | 1971 | Good | $13.07 |
 | Feb | 1972 | Fair | $9.19 |
 | Mar | 1972 | Fair | $9.13 |
 | Apr | 1972 | Fair | $8.82 |
 | Jul | 1972 | Good | $12.67 |
 | Jul | 1972 | Fair | $8.77 |
 | Jul | 1972 | Fair | $8.77 |
 | Aug | 1972 | Fair | $8.71 |
 | Sep | 1972 | Good | $13.10 |
 | Oct | 1972 | Good | $12.66 |
 | Oct | 1972 | Fair | $8.86 |
 | Nov | 1972 | Fair | $8.70 |
 | Dec | 1972 | Good | $12.49 |