This is an example of a general phenomenon: people keep objects that used to be valuable, just because they used to be valuable (but no longer are).

Think of collections of fine china that you never use, antique furniture, pianos, artwork, old electronics, personal relationships, etc. You either spent money at some point to get the things or someone in the past spent a lot of money on it. Tossing it becomes a repudiation of that past value, a painful admission the value has decayed away.