In 2003/04, Dell came out with the Dimension 2400 desktop. I would come to find out 15 years later, that nothing about the system was proprietary, and the case can be used in what would be my first PC build. So that's why a case isn't listed in the parts list. The only downside about it is that I am not able to use the headphone port on the front panel, but that's not that big of a deal, considering I'll be using the audio ports on the MOBO.
It's a simple build with the potential for expansion and the ability to upgrade in the future. For example, if I wanted to add a mechanical hard drive (or a 2.5" SATA SSD) for mass storage, upgrade the RAM, change out the CPU, or add a graphics card, I could do that. For right now though, it's just something to do some internet browsing/everyday tasks with. I also kept the optical drive from the original system (it's not plugged in at all) for aesthetic purposes.
Let me know what you guys think in the comments below! This project has been a really fun and exciting new experience for me, and I hope to be able to do it again in the future.