Toolmaking is not cheap. You're starting with a large block of steel or aluminum, and that's usually a custom alloy with extra hardness if you plan to make more than a few thousand. The molds wear out over time. So that's money right there.
Then it's a couple of weeks of milling, drilling, polishing, welding on support channels, etc. There's a lot of CNC time involved, and that's runtime on million-dollar machines with high maintenance and deprecation costs. If you want it done by hand by experienced machinists, that's even more money.
The Aeropress has some pretty tight tolerances on it's design, so there's more money right there. Size also kills. You want something the size of an Xbox housing? That's gonna be even more.
Then it's a couple of weeks of milling, drilling, polishing, welding on support channels, etc. There's a lot of CNC time involved, and that's runtime on million-dollar machines with high maintenance and deprecation costs. If you want it done by hand by experienced machinists, that's even more money.
The Aeropress has some pretty tight tolerances on it's design, so there's more money right there. Size also kills. You want something the size of an Xbox housing? That's gonna be even more.