Why the same shoe has different prices by size
A blended StockX chart is a headline. Your size is the market. Rare sizes and popular sizes move differently — alerts and portfolio holdings should match the US size you wear.
Size is the variant
On cards the variant is grade. On watches it is box and papers. On sneakers it is US size (plus condition). Mixing sizes creates fake deals the same way mixing PSA 8 and PSA 10 does.
How to watch the right market
Open a style-code guide, set Alert me at my size, and pick your US men's size. Optional condition (Deadstock, VNDS, Used) narrows further. Portfolio holdings should store size the same way.
StockX asks vs eBay solds
StockX shows size-specific asks and bids. eBay sold comps show what buyers actually paid. Use both: ask for availability, solds for truth. GrailHawk ranks live eBay listings today and deep-links StockX when affiliate is live.
References and comparisons
Guides
FAQ
Should I trust a single StockX last sale?
One sale is a data point. Prefer a cluster of recent size-matched solds (eBay or StockX) before you set a target.
Do women's and GS sizes share the men's market?
Often no. Match the sizing system in the listing title. GrailHawk's picker is US men's — adjust the query if you wear GS or women's.
Track this in your portfolio
Log what you own, see live floors and historical value, and keep cost basis next to the chase list you're hunting.
GrailHawk tracks live market prices. We do not authenticate items or provide formal appraisals.