Buying Secondhand Sneakers: Condition, Sizing, and Spotting Fakes
Updated 2026-08-13
A secondhand sneaker guide: reading outsole and midsole wear, sizing across brands, the details fakes get wrong, and which models actually hold value.
The outsole tells you the real mileage, not the description
"Worn a few times" is the most common line in secondhand sneaker listings and also the easiest one to check. Always look at the outsole. Tread that's still sharp across the whole sole means genuinely light use; smoothed-off areas, especially the outer heel and the toe, mean real mileage regardless of what the description says.
If the listing has no outsole photo, ask for one before deciding. A seller describing the shoe honestly will send it without hesitating. Avoiding that photo tells you as much as the photo would have.
Midsoles, glue, and age-related breakdown
Sneakers degrade even unworn, which catches new buyers out. Midsole foam hardens and compresses with age, glue fails until the sole starts separating, and some materials in very old shoes go brittle enough to crumble on the first walk. This is common with older models stored in a box for years — pristine in photos, destroyed the first time they're actually used.
Thailand's heat and humidity accelerate all of it, especially in poorly ventilated storage. Before buying anything old, ask the production year and how it was stored, and look at close-ups along the sole edge for separation or yellowed glue seeping out.
Sneaker sizing isn't consistent across brands
The same US size across two brands doesn't fit the same way — lasts and widths differ, and even models within one brand often run differently. The most reliable measure is the insole length in centimetres, usually printed on the tongue label, compared against your own foot measured in the evening when it's at its largest.
Sellers: photograph the tongue label showing US, UK, EU and CM sizes plus the model code. Buyers who know the model use exactly that to confirm they're looking at the right version and year.
Where fakes usually fall down
Good fakes copy the outward shape closely enough that photos alone rarely settle it. Where they fall down is the detail that's expensive to replicate: check stitching for even, unfrayed work; check the typography on internal labels for correct letterforms and spacing; check that the model code on the label matches the code on the box; and smell them, since many fakes carry a sharp, off glue odour.
The strongest signal is still the price. There's no reason a genuinely scarce, in-demand model sells far below market. If the price looks too good next to other listings of the same model, treat that as the most important information you have.
Which models hold value and which don't
Shoes in continuous mass production, still buyable new, fall hard on the secondhand market — buyers can always compare against a discounted retail pair. Limited runs, collaborations, and discontinued classics hold value far better, and some appreciate over time.
After the model itself, completeness moves the price most. The original box with a label matching the shoes, spare laces, and whatever accessories shipped with that release add meaningfully for collectors, while a bare pair with nothing gets negotiated down even at identical condition.
Frequently asked questions
How do I clean secondhand sneakers without ruining them?
Soft brush, mild soapy water, gentle scrubbing, then air dry in the shade. Never use a washing machine or dryer — heat and tumbling break down the glue and distort the structure. Suede and nubuck need a dedicated brush and must not be soaked. Yellowed white rubber has oxidised with age, and that's usually not fully reversible.
Should I buy old deadstock that was never worn?
Be careful. Unworn old stock looks perfect in photos, but foam and adhesive degrade with time whether the shoe was worn or not. A pair stored for years can separate or crumble on the first wear. If you're collecting rather than wearing, that's fine — but if you plan to wear them, ask the production year and weigh that risk first.
What photos should a sneaker seller include?
At minimum: both side profiles, front, back, both outsoles, the tongue label showing size and model code, the interior showing insole condition, the original box if you have it, and close-ups of every flaw. That set answers nearly every question a buyer would have asked, and it sells noticeably faster.
What if I suspect the pair I bought is fake?
If you paid through SOI Pay and you're still before confirmation or the 72-hour auto-release, open a dispute in-app immediately with photos of the details that concern you — that freezes the payout. Once the window has passed, or if you bought outside the platform, your options narrow considerably. Inspect the moment the parcel arrives rather than leaving it.
