Sneaker Repricer
Sneaker reselling on eBay moves faster than any manual pricing routine can keep up with. A Jordan 1 that sold for $320 on drop day can slide to $210 within two weeks as hype cools and supply catches up. Meanwhile, size 9 and size 13 are entirely different markets — a size 9 pair might have 40 competing listings while size 14 has three. Undercut tracks each SKU independently, beats the lowest live competitor automatically, and never drops below the hard floor you set: cost plus fees plus minimum margin. No spreadsheet updates at midnight. No sold-below-cost surprises.
eBay charges a reduced 8% final value fee on sneakers sold for $150 or more through its Authenticity Guarantee program, compared to the standard ~13.6% on most categories. That 5.6-point spread is meaningful. On a $220 pair, standard fees run about $30.22 (13.6% + $0.30 order fee); the sneaker rate drops that to $17.90 — a $12.32 difference per sale. When you build your floor in Undercut, use the 8% rate for eligible pairs so you're not leaving margin on the table by overcalculating fees. For pairs under $150 or categories that don't qualify, revert to 13.6%. Getting this input right is what makes the floor calculation trustworthy.
Hyped sneaker releases follow a predictable arc: price peaks in the first 24–72 hours, then bleeds as more pairs hit the secondary market. A Nike Dunk Low might open at $280 on release weekend and settle at $165 three weeks later. If you're holding inventory and repricing hourly (Free plan) or every 15 minutes (Pro plan), you're either chasing too slowly or burning margin by dropping too fast. The practical move: set a tighter floor early — say, cost $130 + 8% fee $17.90 + $15 minimum margin = $162.90 floor — and let Undercut compete aggressively above it. As market price falls toward your floor, you stop repricing down and hold. That's when you decide whether to hold or liquidate consciously, not by accident.
A size 10.5 Air Force 1 and a size 6.5 Air Force 1 in the same colorway are not competing with each other. Supply and demand differ enough that the size 6.5 might sit at $95 while size 10.5 clears at $75. If you list multiple sizes under one static price or one shared floor, you either leave money behind on scarce sizes or reprice rare sizes down unnecessarily. In Undercut, each listing gets its own floor. List your size 6.5 pair with a floor of $88 and your size 10.5 pair with a floor of $68, and both compete independently. Sellers running 20–50 size variants of the same shoe benefit most from Pro and Scale ($79/mo and $199/mo), where per-listing AI aggressiveness tuning lets you set how fast each listing moves toward its own floor.
Vague floors get sellers into trouble. Here is a concrete example for a Nike SB Dunk Low qualifying for Authenticity Guarantee:
Undercut is built for eBay resellers who need a simple, trustworthy floor and automatic undercutting. It is not a fit for every sneaker seller. If you sell primarily on StockX, GOAT, or Kicks Crew, Undercut does not reprice those platforms. If your volume is under 25 active listings and you prefer checking prices manually once a day, the effort of setup may not pay off — though the Free plan costs nothing to try. If you need cross-platform repricing (eBay + Amazon + Shopify simultaneously), Undercut does not cover that use case today. For pure eBay sneaker resellers — especially those with 25 or more live listings across multiple sizes and colorways — the 14-day Starter trial makes the ROI clear fast.
14-day Starter trial, no card. Undercut competitors automatically — never below your minimum.
Start freeDrop your email — we'll send early access and founding pricing.
Does Undercut automatically apply the 8% eBay sneaker fee when calculating my floor?
No — you input the fee rate yourself when setting up each listing's floor. Undercut does not auto-detect listing category. For sneakers over $150 sold through Authenticity Guarantee, enter 8% as your fee rate. For pairs under $150 or non-qualifying listings, use 13.6%. Getting this right is important: underestimating fees erodes your margin; overestimating fees sets your floor too high and you lose sales to competitors.
How quickly does Undercut reprice when a sneaker's market price drops after a hype release?
Free plan reprices hourly, Starter every hour, Pro every 15 minutes. For fast-moving release-day inventory, Pro's 15-minute cadence is worth the upgrade — prices can move meaningfully in an hour during the first 48 hours post-drop. However, Undercut will never reprice below your floor regardless of how fast the market drops, so the floor is your real protection. Repricing speed affects how competitive you are above the floor, not whether you lose money.
Should I set a separate floor for each shoe size, or can I use one floor for an entire colorway?
Set separate floors per listing whenever sizes have meaningfully different market values. A size 13 or size 6 in a popular colorway often commands a premium because supply is thinner — using a shared floor means Undercut will reprice your rare size down to match common-size competition unnecessarily. If sizes are trading at similar prices, shared floors are fine, but individual floors give you the most control and protect margin on scarce sizes.
What happens in Undercut when the lowest competitor price falls below my floor?
Undercut holds your listing at the floor price and stops repricing downward. It does not match or beat a competitor who is selling below your cost-plus-margin minimum. Your listing stays live at floor price — you may sell if a buyer pays your floor, or you can manually pull the listing. Undercut will never trigger a sale that loses you money based on the floor you set. You're in control of whether to lower the floor or remove the listing.
Is Undercut cheaper than StreetPricer or RepricerExpress for a sneaker reseller with around 100 listings?
At 100 listings, Undercut's Starter plan is $29/month. StreetPricer and RepricerExpress both start higher for equivalent listing counts and include features many sneaker resellers don't need. Undercut's design is simpler and cheaper by intent. The 14-day Starter trial (no credit card required) lets you verify performance before paying. Annual billing drops the effective rate further — equivalent to two months free.
Related: eBay Seller Fees Explained · How to Set an eBay Price Floor · Repricing Without Losing Margin · eBay Profit Calculator