I started buying parts for a build and now I don't want to build it

Where is the best place to sell parts? So far I've only bought a PSU, a MB and a case for an ITX build. I don't want to do it anymore because I'm so put off by the insane prices of everything. I'm just going to stick with my old gaming laptop and if that dies I'm just gonna do something else as a hobby. Any advice would be great, thanks!