Repair vs resell: the decision tree
Every device you buy lands somewhere on a triangle: repair-and-resell, flip-as-is, or part out. The right call depends on the part cost, the grade lift, and the velocity of the model. This is the framework experienced resellers use.
The core math
A repair only makes sense when the resale-grade lift exceeds the part cost plus your labor. The formula:
Repair worthwhile when: (Resale price at higher grade) − (Resale price at current grade) − (Part cost) − (Labor cost) − (Risk discount) > target margin.
The risk discount accounts for repair failure (you broke a $200 phone trying to save $50) or grade downgrade after repair (third-party screen drops the device a tier).
Decision rules by component
Battery (sub-85% health)
Almost always worth replacing. Battery swap typically costs $25–$40 (aftermarket) or $50–$80 (OEM). Grade lift on iPhone 13+ is $40–$70 — comfortably positive. Verdict: repair.
Cracked screen
Depends on storage tier. For 128 GB iPhones, a $90 third-party screen lifts resale ~$75 — net negative. For 256 GB+, the gap widens to ~$140 — net positive. For Pro / Pro Max models, OEM screen via Self Service Repair is worth it. Verdict: repair on Pro / 256 GB+; flip as-is or part out on base / 128 GB.
Charging port (intermittent)
$20–$40 part on most modern phones. Labor is tedious but doable. Grade lift is significant — a phone that doesn't charge reliably is hard to resell. Verdict: repair.
Rear glass (cracked, no internal damage)
iPhone 12+ and Galaxy S22+ have laser-sealed backs that are very labor-intensive to replace. Aftermarket: $40–$80 part + 60–90 minutes labor + risk of damaging the wireless charging coil. OEM via Self Service Repair: $200+. Grade lift on B-grade-with-cracked-back: $50–$80. Verdict: usually flip as-is at C grade — disclose the crack.
Face ID / TrueDepth module (iPhone)
$80–$140 part, but iPhone 12+ pairs the module to the device — only Apple-authorized service can swap it without permanent feature loss. Grade lift on a phone with no Face ID is $50–$100 max. Verdict: usually flip with Face ID disabled, sold as Touch-only or part out the working components.
Logic board (any major fault)
Microsoldering exists, but for sub-$300 devices it's never economical. Verdict: part out.
Velocity-adjusted decisions
Some models sell faster than others. A repair worth doing on a slow-moving model (capital tied up longer) might not be worth doing on a fast-moving one (every day of repair time costs you a turn). Three rules:
- iPhones turn faster than Android — repair calculations get more aggressive (i.e. more repairs are worth it).
- Flagship Galaxy models turn faster than mid-range Galaxy — same dynamic.
- Older Pixel and OnePlus models can sit for weeks; lean toward flip-as-is unless the part cost is trivial.
The decision tree
| Condition | Verdict | Reasoning |
|---|---|---|
| Battery <85%, no other issues | Repair | Reliable grade lift, low part cost |
| Cracked screen on 256 GB+ flagship | Repair | Grade lift covers part + labor |
| Cracked screen on 128 GB base model | Flip as-is at C grade or part out | Repair barely covers part cost |
| Charging port intermittent | Repair | Hard to sell otherwise |
| Rear glass cracked, charging works | Flip as-is at C grade | Labor too high vs lift |
| Face ID broken on iPhone 12+ | Flip with disclosure | Pairing limits unauthorized repair |
| Logic-board fault | Part out | Repair never economical sub-$300 |
| Activation Lock on, can't clear | Part out | No legitimate sale path |
| Multiple defects | Part out | Repair stack exceeds resale value |
The "part out" workflow
Phones with multiple defects, locked status, or logic-board issues go to parts. Working screens, batteries, rear cameras, charging ports, and TrueDepth modules all have wholesale markets — eBay, parts buyer aggregators, or local repair-shop networks. Typical recovery on a parts-out phone: 30–50% of what a working unit would have brought. Document IMEI before tearing down (some part buyers require it).