A used laptop or phone listed 40-60% below retail can be a genuinely good deal or a costly mistake, and the difference usually comes down to five checks that take under ten minutes total. Skipping them is how buyers end up with a locked phone, a laptop with a swollen battery, or a device that was reported stolen.
In this article:
- Check the IMEI or Serial Number Before You Pay
- Ask for Battery Health, Not Just Battery Percentage
- Refurbished vs. Used vs. "For Parts": What the Labels Actually Mean
- Reading Seller History and Ratings Correctly
- Safe Payment Methods for Resale Purchases
- What to Test in Person or on a Video Call
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Check the IMEI or Serial Number Before You Pay
For phones, ask the seller for the IMEI number and run it through a free checker before paying, which will flag if the device is reported lost, stolen, or still financed on someone else's account. For laptops, the serial number can often be checked against the manufacturer's warranty lookup to confirm it isn't reported stolen and to see remaining warranty coverage, if any.
Ask for Battery Health, Not Just Battery Percentage
A phone showing "100% battery" in a listing photo only reflects current charge, not battery health or maximum capacity. Ask the seller to send a screenshot of the battery health percentage (iPhone: Settings > Battery > Battery Health; most Android phones show a similar stat in settings or via a diagnostic code). Below 80% maximum capacity means noticeably reduced daily battery life and is a fair reason to negotiate the price down.
Photo: Lorem Picsum, free to use.
Refurbished vs. Used vs. "For Parts": What the Labels Actually Mean
"Refurbished" should mean the device was inspected, had defective components replaced, and passed functional testing, ideally by the manufacturer or a certified refurbisher, and usually comes with some warranty. "Used" or "pre-owned" means no guaranteed inspection process took place. "For parts" or "as-is" explicitly disclaims working condition. Treat the label as a starting point and ask the seller directly what testing, if any, was done before listing.
Reading Seller History and Ratings Correctly
A seller's overall star rating matters less than the volume and recency of reviews specifically for electronics. A seller with 95% positive feedback across 40 general reviews is a weaker signal than one with 90% positive feedback across 400 electronics-specific transactions. Look for the platform's transaction count and category breakdown, not just the headline percentage.
Safe Payment Methods for Resale Purchases
Use a payment method with dispute protection, a credit card through the platform's checkout, or the marketplace's own buyer-protection program, rather than direct bank transfer, cash apps without buyer protection, or gift cards, all of which are difficult or impossible to reverse if the item doesn't match the listing. In-person sales through local marketplaces are the main exception, where cash and in-person inspection substitute for platform protection.
What to Test in Person or on a Video Call
Before completing a local sale, power the device on from a cold start, check that all ports charge and transfer data, test cameras and speakers, and confirm the device isn't locked to a carrier account or iCloud/Google account the seller won't remove. For remote purchases, ask for a brief video showing the device powering on and the settings screen displaying the serial number or IMEI, which is harder to fake than static photos.
Key Takeaways:
- Always check a phone's IMEI or a laptop's serial number for stolen or blacklist status before paying.
- Ask for battery health percentage specifically, not just battery charge level shown in a screenshot.
- "Refurbished" implies inspection and testing; "used" and "for parts" don't guarantee either.
- Judge sellers by review volume and category-specific history, not just their overall star rating.
- Pay through a method with dispute protection rather than direct transfer or cash apps for remote purchases.
How do I check if a used phone is stolen before buying?
Ask the seller for the IMEI number and run it through a free IMEI checker or your carrier's blacklist lookup tool before completing the purchase.
What battery health percentage is still worth buying?
Above 85% is generally solid; 80-85% is usable but expect noticeably shorter daily battery life; below 80% is a fair reason to negotiate the price or look elsewhere.
Is "refurbished" always better than "used"?
Usually, since refurbished implies some inspection and testing process, but the term isn't strictly regulated everywhere, so it's worth asking the seller directly what testing was actually performed.
What's the safest way to pay for a resale purchase?
A payment method with built-in dispute protection, like a credit card through the platform's official checkout or the marketplace's buyer-protection program, rather than direct bank transfer or unprotected cash apps.