| Month | Year | Condition | Price | |
 | Jan | 1977 | Fair | $3.90 |
 | Jan | 1977 | Good | $6.81 |
 | Feb | 1977 | Good | $7.64 |
 | Feb | 1977 | Good | $7.64 |
 | Feb | 1977 | Good | $7.64 |
 | Mar | 1977 | Good | $8.19 |
 | May | 1977 | Good | $8.95 |
 | Jun | 1977 | Fair | $5.04 |
 | Jun | 1977 | Fair | $5.04 |
 | Jun | 1977 | Fair | $5.04 |
 | Jul | 1977 | Fair | $5.00 |
 | Jul | 1977 | Good | $10.02 |
 | Jul | 1977 | Fair | $5.00 |
 | Jul | 1977 | Fair | $5.00 |
 | Aug | 1977 | Good | $9.48 |
 | Sep | 1977 | Good | $10.35 |
 | Sep | 1977 | Good | $10.35 |
 | Sep | 1977 | Good | $10.35 |
 | Oct | 1977 | Fair | $5.12 |
 | Oct | 1977 | Fair | $5.12 |