Pucks, gloves, sticks, skates, helmets, jerseys, and other clothing that were worn or used in games carry interest for hockey fans. If the items have been autographed or have a validated provenance, their value increases. Items signed by those who are famous in the NHL are of particular interest.
With its relatively long history and its restrictive hall of fame requirements, equipment used in games can rise in value quickly. Like all memorabilia, it needs to be validated, so the signers, and historical significance of the event in which the equipment was used is the greatest contributing factor to its value.
The value in game equipment from NCAA sporting events rests solely in who has signed it, or in the historical significance of the event. This is because of the number of collegiate sports, the number of colleges and universities, and the different tiers of the NCAA.
Basketballs, uniforms, and other equipment used in the various professional basketball leagues are difficult to come by. Simply possessing one, though, is not enough. It must somehow be identified as a ball from an event. Autographs and dates help, especially if signed by participants. The final score and what happened in the game increase its value, especially if the game had some historical significance.
Baseballs have a fluctuating value because they are among the most common pieces of equipment used in game settings, what with batting practice, foul balls, and such. If the ball comes from a game of some historical significance, its value increases. If it is signed and dated by players from that event, the value rises. If it has individual significance, a signed ball carries the greatest value.