Where to sell Fortnite bricks?

I'm curious, where exactly can one sell their Fortnite bricks? I've heard they have some sort of value in the gaming community, but I'm not sure where to go to actually put them up for sale. Is there a specific marketplace or platform that's commonly used for this purpose? Or is it more of a case-by-case basis, where you have to find individual buyers willing to make a deal? I'm just trying to get a better understanding of the process. Thanks in advance for any insights you can provide!