I have bought small toys from thrift shop bins that will make great mods that never make it into my games because they are fun to play with at my desk.
I have bought mods, but lost interest in the game before they arrived. I moved on to enjoying a new game and forgot to install them only to find them sitting in the coin bucket a few years later. I installed them and brought new life to an old game years later.
I will keep a game that only my kids enjoy, but have resentment about it because I am space constrained.
I always check the local craigslist in a town I am visiting on vacation to see if there are any pins on my want list even though I would have no means of transporting them if found. I always think "I will find a way!"