Brian---up until 1994 I attempted to collect everything and anything baseball related that Topps put out if it was listed in the SCD Standard Catalog. I quit in 1995 at the beginning of of the great proliferation ( Topps products listed in SCD went from went from 8 in 1994 to 18 in 1995). In 1997, in addition to the Pro Shooters, there are 38 other Topps baseball products listed. After 1994 I just kept up with the Topps base set, any update to it, and the Heritage sets in master format. Even that is a lot of stuff
The SCD description of the Pro Shooters says is was a limited distribution test set designed as "another attempt to market marbles with baseball player photos". I don't know if this is a reference to a post 1994 effort ( I know there were no Topps marbles prior to 1995), or all the way back to the 1960 Leaf set that packaged cards and marbles to get around the Topps exclusive contracts to market player pictures with gum and candy.
I store all my set in binders and although the Topps 56 Pins and later coin issues starting in 1964 were doable in binders using methods used by coin collectors, things like these, marbles, the 1992 Topps Photo Balls, the 1991 Stand Up Superstars, and the 1989 and 1990 Double header issues, are virtually impossible to display. You just have to tuck them away somewhere
They are neat looking though
