| Month | Year | Condition | Price | |
 | Jan | 1979 | Good | $10.28 |
 | Jan | 1979 | Good | $10.28 |
 | Jan | 1979 | Very Good | $13.16 |
 | Jan | 1979 | Good | $10.28 |
 | Feb | 1979 | Good | $10.43 |
 | Feb | 1979 | Very Good | $13.48 |
 | Mar | 1979 | Very Good | $42.59 |
 | Apr | 1979 | Very Good | $13.37 |
 | May | 1979 | Good | $9.44 |
 | Jun | 1979 | Very Good | $11.93 |
 | Jul | 1979 | Very Good | $10.88 |
 | Aug | 1979 | Very Good | $10.18 |
 | Sep | 1979 | Very Good | $9.04 |
 | Oct | 1979 | Good | $5.98 |
 | Oct | 1979 | Good | $5.98 |
 | Dec | 1979 | Very Good | $6.73 |
 | Dec | 1979 | Very Good | $6.73 |
 | Jan | 1980 | Very Good | $5.88 |
 | Jan | 1980 | Good | $3.77 |
 | Feb | 1980 | Good | $3.08 |