Direct answer
Phone inventory planning is a mix and turn plan, not a shopping list. Decide the unused, used, and refurbished split, cap slow models, and hold a reserve for DOA before you raise MOQ. A carton that cannot finish in your channel is storage, not stock.
Key takeaways
- Plan sell-through before you accept a mix.
- Cap any SKU you cannot replace or cannot activate.
- Unused, used, and refurbished need different shelves and books.
- DOA reserve is part of the buy, not an afterthought.
- Fast models fund slow models only if you wrote that bargain.
Inventory is cash wearing a model code. Plan the exit, then the purchase.
Who this guide is for
Resellers who already have a channel and are about to raise quantity or add a second inventory state.
The planning table
| Decision | Write | Accept | Clarify | Reject |
|---|---|---|---|---|
| State mix | % unused / used / refurb | Separate bins | “Whatever arrives” | One price, three states |
| SKU cap | Max units per code | Matches turn | Open mix | Forced leftover colors |
| Version | Codes the channel can sell | Sample attach | “Global” | Known dead radio |
| Inspection capacity | Units you can finish this week | Lot ≤ capacity | Hope | Carton larger than the checklist |
| DOA reserve | Cash or % | In the buy | “Supplier will handle” | No clause |
| Slow-model rule | Discount day or outlet | Written | “Later” | Counted as full value |
R2v3 does not plan your shelf. NIST SP 800-88 does not either. They only remind you that used and refurbished units carry data and process claims unused sealed stock should not.
Fast and slow
A fast model is one you can replace and inspect again. A slow model is one you bought because it was in the mix. Mixed-SKU orders create slow models on purpose. Price them before the deposit.
Turn is not a vibe. It is days from balance payment to cash back, including the units that failed. Use the margin page and the profit calculator.
Channel rules that change stock
- Marketplaces that reject certain grades or locks
- Retail that needs official Google apps
- Buyers who only take one iPhone region
- Service promises you cannot keep on Unknown parts
If the channel changed, the old leftover is a new product. Re-grade it. Do not hope.
Related guides
Frequently asked questions
How many models should a small reseller hold?
As many as you can inspect and finish. A long tail of codes you cannot test is not a catalog. It is leftover risk.
Should I keep used and unused in one bin to save space?
No. They use different checklists and different customer promises. Mixing them is how the wrong label ships.
Sources and methodology
- NIST SP 800-88 Rev. 2 — National Institute of Standards and Technology Accessed August 22, 2026.
- Welcome to R2v3 — Sustainable Electronics Recycling International Accessed August 22, 2026.
Update history
- — First published. Official sources on this page were accessed on this date unless a later note says otherwise.
Factual corrections after publication are listed on the corrections page. There is no separate reviewer identity on this desk. See the editorial policy.