I like the concept and the sample items are all interesting (e.g., a bus ticket that teleports people to random bus stops). They feel unique but not overpowered. Mechanically, there's some work to do on the referee's part to implement this (e.g., establishing how the Collector must test an item to unlock its ability). On the other hand, that offers people more ability to customize this Trait and fit it into their game in a way that balances the Collector gaining additional abilities alongside general player advancement.

A trait that allows a character to use mundane items like magic ones, sometimes narratively and sometime mechanically. Not really enough There there to compete with the other entries in the jam, but usable. The list of collectables could stand expansion.