Glossary Term
A race to the bottom happens when two or more eBay sellers keep undercutting each other automatically, with no minimum price to stop them. Each repricing cycle shaves a few cents off the ask; within hours the listing price can drop below eBay fees, let alone profit. It is not a strategy—it is a mechanical outcome of automation without guardrails. The fix is not slower repricing; it is a hard floor below which your repricer simply refuses to go, so you stay competitive without bleeding margin every time a competitor blinks.
In economics, a race to the bottom describes competitive pressure that forces every participant to match the worst terms in the market. On eBay, it plays out in minutes rather than months. Seller A lists a widget at $24.99. Seller B's repricer sees it and drops to $24.89. Seller A's repricer fires back at $24.79. By the time a buyer searches, the price may have fallen to $18.00—below the point where either seller covers eBay's ~13.6% final value fee plus the $0.30 per-order fee, let alone their cost of goods. Neither seller intended to sell at a loss. Both just told their tools to beat the lowest price, full stop.
The cycle has four repeating steps. First, one seller reprices down by a small increment—often $0.01 to $0.10. Second, the other seller's repricer detects the new lowest price and fires its own downward move within seconds or minutes. Third, because neither repricer has a floor, they keep leapfrogging until one hits a platform minimum or a human notices. Fourth, one seller eventually sells the item at a loss; the other may never sell it at all. A concrete example: a $20 item with $8 cost, eBay fees of roughly $3.02 (13.6% of $20 + $0.30), and $1 shipping leaves $7.98 gross profit at full price. A race can erase that entirely within a single repricing session if neither side sets a floor around $12.32—the true break-even.
A floor is a per-listing minimum price that your repricer will never cross, no matter what competitors do. Set it at cost + eBay fees + minimum margin—for example, cost $8.00 + fees ~$2.24 (13.6% of $16.50 floor) + $0.30 per-order + $1 shipping + $1 minimum margin = roughly $12.54. Once your repricer hits that floor it stops cutting and holds. If a competitor keeps going below your floor, you simply do not match them. You lose the sale to someone willing to take a loss, but you do not take that loss yourself. Over hundreds of SKUs, floors turn repricing from a liability into a systematic margin defense. Undercut is built floor-first: you set the floor before the repricer ever fires a price change.
Not every competitive listing is a race to the bottom. Look for three warning signs before activating a repricer on a crowded SKU. First, check the listing history: if the current price is more than 30% below the average sold price for the same item over the last 90 days, a race is already underway. Second, count the active sellers: five or more identical listings within $1 of each other often signals automated leapfrogging. Third, run the math before repricing: if the lowest competitor price minus eBay fees minus your cost leaves less than $1, you are being invited to race, not compete. In those cases the better move is to hold your current price, optimize your listing title and photos, and wait for oversupplied competitors to sell through their stock.
Undercut is designed for sellers who want to stay competitive without manual price monitoring, on eBay specifically. It works well when you have clear cost data per SKU and can set accurate floors. It works less well on ultra-commoditized categories—brand-new electronics, for example—where dozens of sellers list identical new-in-box units and margins are structurally thin. In those cases, automated repricing without a rigorous floor strategy accelerates losses rather than preventing them. If your average gross margin per SKU is under 15% before fees, the first step is fixing your sourcing or focusing on less-competitive categories—repricing software cannot manufacture margin that was never there.
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What is the simplest definition of a race to the bottom on eBay?
Two or more sellers use automated repricing to stay below each other's price, with no minimum price set. Each repricing cycle pushes the price lower until one or both sellers are covering eBay's fees—roughly 13.6% plus $0.30–$0.40 per order—with nothing left for cost of goods or profit. It is an unintended outcome of automation without floors, not a deliberate pricing strategy.
Can a repricer actually cause me to sell below cost?
Yes, if you do not set a hard floor. A repricer's job is to match or beat the lowest competitor. If that competitor is already below your break-even—or if the two repricers keep leapfrogging each other—your repricer will follow right off the cliff. Undercut prevents this by locking in a per-listing floor before any price change fires. If the market goes below your floor, you hold, not follow.
How do I calculate the right floor price for an eBay listing?
Start with your landed cost per unit. Add eBay's final value fee—typically 13.6% of the total sale price including shipping—plus the per-order fee of $0.30 or $0.40 depending on your store tier. Add your actual shipping cost. Then add your minimum acceptable margin in dollars. That sum is your floor. Example: $8 cost + $2.24 fee + $0.30 order fee + $1.00 shipping + $1.00 margin = $12.54 floor.
Should I ever reprice into a race to the bottom to win the sale?
Only if you have analyzed why competitors are selling below apparent break-even. Sometimes a seller has dramatically lower acquisition costs or is liquidating inventory—in which case they will sell through quickly and the market will recover. More often, matching a below-cost price just means taking a loss. The better play is to hold your floor, optimize your listing quality to win on factors other than price, and let undercutters exit the market on their own.
How fast does Undercut reprice, and does speed matter in a price war?
On the Free plan, Undercut reprices hourly. Starter reprices hourly too. Pro reprices every 15 minutes. In a true race to the bottom, repricing faster just accelerates the descent. Speed matters most in healthy competitive markets where you want to react quickly to genuine price movements. In a race, the floor—not the speed—is what protects you. A floor set correctly on the Free plan is safer than no floor on the fastest repricer available.
Related: What Is a Price Floor? · Setting an eBay Price Floor · How to Avoid Selling Below Cost on eBay · Repricing Without Losing Margin