There's a large used market, especially for these super expensive sets. Many people will resell sets after having them on display for a few months or years. For

There's a large used market, especially for these super expensive sets. Many people will resell sets after having them on display for a few months or years. For some like me 90% of the enjoyment is in putting huge sets together, so it'll be sold on after just a few weeks. But even then, a few pieces being stuck together permanently doesn't matter much. But there is a small monitory of people who absolutely do break up sets to add to their brick collection in order to build custom models.