In October 1990, the 1986 Topps set joined the rest of the 1984-1990 Topps sets to reach the highest value it would ever obtain.
In November 1990, the 1984-1990 Topps sets continued to remain climaxed at their all-time high value for the second month in a row.
In December 1990, the 1988, 1989, and 1990 Topps sets all dropped by in value, which signified the start of a crash that these 3 sets, as well as the next couple of releases, would never recover from.
In January 1991, the 1986 and 1987 Topps sets began to drop in value from their all-time high.
In February 1991, the 1991 Topps set was listed for the first time at $24 and would only drop from there. The 1984 Topps set would also begin dropping from its all-time high. The 1985 Topps set would start experiencing its great descend by August 1991 resulting in 8 consecutive "modern" sets de-valuing at a significant rate. The following year, the 1992 Topps set would also experience the same de-valuing trend. This would start the sobering reality for collectors that new baseball card releases were not the great investment that they were led to believe throughout the 1980s.
Between 1993-1994, most of the rest of the pre-1984 Topps sets would all begin to climax and then fall in value. The great baseball card Bust Era began in 1991. I will eventually follow up with a post on the falling trends of the older sets and the ending of the Bust Era.