1. Identify the release before searching.
Photograph the size label inside each shoe and the box label if you have it. Record the brand, model, colorway and exact style code. A nickname can describe more than one release, and a similar color scheme does not make two pairs the same product.
Keep the size system with the number: US men’s 10, US women’s 10 and UK 10 are different searches. Note whether the pair is an adult or kids’ release. Check the shoe label against the box rather than assuming the box belongs to the pair. Add the release year only when you can verify it.
A useful search starts with “[style code] [size system and size] used”. Add the model name if the code returns too little evidence. Read the actual listing details before accepting a match.
2. Record what a buyer would inspect.
Describe the pair’s condition with photographs and specific notes, not only a score such as “8/10.” Two sellers can mean very different things by that number.
- Upper and lining: creasing, stains, tears, fading, heel-lining wear and odor.
- Soles and structure: heel drag, tread wear, separation, cracking and any repair. A wearable pair and a damaged display pair need different comparisons.
- What comes with it: the original box and its condition, spare laces, tags and release-specific accessories. Record replacements or missing items.
Use matching views of both shoes, including their soles. Do not apply an automatic “used means 30% off” rule. Look for evidence with comparable wear and included accessories; if none exists, explain the uncertainty.
3. Separate completed sales from asking prices.
A completed sale shows an accepted transaction price. An active listing shows what a seller wants. Record the source, URL, sale or observation date, condition, size, currency and whether shipping is included. Check whether an accepted offer amount is actually visible before treating the displayed price as the final sale amount.
eBay’s Product Research documentation describes sales data and filters for item condition. It is one place to research comparisons if you have access. Read individual records as well as summary averages.
Check the market segment too. StockX’s Verified Marketplace is for new, unworn items; StockX describes its Listings Marketplace separately for used or unique items. A price from the new-pair market is not a used-pair sale, even when the model matches.
Start with the same size and condition in a recent period. If evidence is sparse, widen the time window and mark older records. Do not quietly mix another size or a different release into the range. Count a relisted pair once, and avoid treating the same seller’s cross-posts as independent evidence.
4. Build a range from the matches that survive.
The sample pair is a Draft Studio Runner, style DS-EXAMPLE-01, slate, US men’s 10. It has worn soles, light upper creasing, its original box and no spare laces. Its recorded purchase cost is US$180.
On September 9, 2026, the illustrative research record contains:
- $140 sale, August 24: same code and size, comparable wear, original box. Keep.
- $155 sale, September 1: same code and size, comparable wear, original box. Keep.
- $160 sale, September 5: same code and size, comparable wear, original box. Keep.
- $220 active ask: same pair and condition, but no completed sale. Keep as context, outside the sold range.
- $300 unworn sale and $245 sale in US men’s 8: wrong condition or size. Exclude from this pair’s used-sale range.
Assume the three retained records come from separate sellers, show the final accepted amounts and exclude shipping. The observed comparable-sale range is $140–$160. Its $150 midpoint is a convenient summary, not a predicted sale price. Three matches still leave uncertainty about buyer demand, condition differences and the next transaction.
At that midpoint, the difference from the $180 purchase cost is −$30 before selling costs. If the pair actually sells for $150, with $15 in actual fees and $12 in seller-paid shipping, net proceeds are $123 and the result against the $180 cost is −$57. Those expense amounts are illustrative, not a marketplace fee schedule. The resale profit calculator lets you enter your own costs.
5. Keep the evidence with the collection.
Keep your original purchase amount, the dated estimated range and an eventual actual sale amount as separate records. Review the estimate when the pair’s condition changes, better comparable evidence appears or you plan to sell. An old range should retain its observation date.
For a whole rotation, add only comparable estimates in the same currency and state how many pairs remain unvalued. A pair with no credible matches is “unknown,” not worth zero. The guide to market value and resale price explains the different price types.
How Pieces fits this workflow.
The Pieces sneaker collection tracker organizes pairs, sizes, condition and purchase prices. You can start a record from a photo or product link, review the identity and inspect available public market evidence. This guide’s manual research method does not mean Pieces imports your private marketplace research history.
A collection estimate is informational. Pieces does not authenticate sneakers, provide professional appraisals or guarantee a selling price. Review the evidence for your actual pair before relying on the number.