How good is the cost from PCBWay? I tried to upload a model of a simple spur gear @ xometry and they quoted $200+ each for 3D printing with sintered material.
It was a custom bottom camera plate for a grip. It was $100 CAD, CNC'd aluminium. You can try to upload your design and see.
If you requested metal sintering I'm not too surprised by the cost. Gears can also be traditionally machined of course, and some are available off-the-shelve.