The short answer
Make the state decision before the money decision. A part belongs in the Shredder only after the game identifies it as broken and you have no repair use for it. Parts removed from an old Marketplace device can still be usable or cleanable.
If you do not own a Shredder yet, keep confirmed broken parts separate when storage permits. That preserves the option to convert them later without confusing them with working inventory.
Step by step
1. Check the part state
Use the Notebook or explicit game status, not the part’s age or appearance.
| Part state | Keep? | Next action | |---|---:|---| | Usable | Yes | Store as a spare or install it | | Dirty but serviceable | Yes | Clean, verify, then store or install | | Broken | Temporarily | Separate for the Shredder | | Unknown | Yes | Diagnose before making an irreversible choice |
The most expensive mistake is not holding a worthless part; it is destroying a useful part because it came from a donor device.
2. Separate early broken parts
Before you own the Shredder, create a clear physical or mental boundary between usable inventory and confirmed waste. Do not let a future replacement part disappear into an undifferentiated pile.
Storage pressure can change the decision. If keeping broken parts makes it impossible to operate the bench, prioritize a workable shop over an unverified future return. This guide cannot assign a universal storage threshold because no controlled launch-build value test supports one.
3. Buy the Shredder when waste is a recurring problem
The illustrated Steam guide shows three Shredder shop entries, and the official achievements confirm that the machine is intended for broken parts. That makes it a useful specialized purchase once broken components accumulate—not automatically a better early purchase than the Professional Screwdriver or required licenses.
4. Shred only confirmed waste
Move one verified broken part through the machine and observe the result. Keep usable donor stock away from the process. If you are documenting returns, record the exact part and game version rather than assuming every component pays the same amount.
How the Shredder fits the inventory loop
The broader shop loop is:
- Buy only a Marketplace device with a real purpose.
- Disassemble and diagnose every component.
- Retain usable spare parts.
- Clean serviceable dirty parts.
- Isolate confirmed broken parts.
- Shred the waste once the machine is available.
This creates value from waste without turning every old device into presumed trash.
What not to assume
- Every removed part is broken.
- Every broken part produces the same return.
- A specific Shredder tier has a known payback period.
- Buying the Shredder before high-frequency tools is always optimal.
Sources
- Official Steam achievements — confirms the Shredder’s broken-part purpose.
- Kleynce’s illustrated 100% guide — shows the three Shredder shop entries.
- InsideAGameR launch gameplay — provides a direct comparison with usable donor-device parts around 29:52.
- Into Indie’s beginner guide — independently reports converting broken-part waste into money.