Repricing with a safety net — not a gut feeling.
Manual edits on Sunday, a lost Buy-Box race on Monday, margin loss on Tuesday. Today the engine takes over every five minutes — and the Sentinel module halts it automatically the moment something drifts.
5 min
Buy-Box refresh at peak
+18 %
marketplace margin after 8 weeks
+12 pp
Buy-Box share across the top 300 SKUs
From gut feeling to controlled automation.
There are plenty of repricing tools. What was missing: a stop button that presses itself when something runs out of bounds — and a strategy that doesn't blindly undercut every competitor.
The company
A marketplace specialist with around 1,200 active ASINs on Amazon DE and AT, several private and exclusive brands, mid-volume, high seasonality. Two people on the marketplace team — and weekends were traditionally a repricing shift.
The challenge
The previous repricing logic was rule-based and blind to brand strategy. Every new competitor triggered a race to the bottom that took days to recover from. Sentinel? Didn't exist. Drift was noticed hours later — usually after the revenue was already gone.
Our approach
We grouped the catalogue into strategy tiers — Hero, Volume, Tail — and defined a price band with floor and ceiling for each tier. Only then was the AI allowed in. Sentinel monitors the engine every second and pauses it if anything runs outside tolerance.
- Catalogue split into 3 strategy tiers (Hero · Volume · Tail)
- Per-ASIN price bands with floor + ceiling configured
- AI engine activated with Buy-Box optimisation goal
- Sentinel auto-pauses the engine on any drift > 4 %
Rollout in practice
We didn't go live with the whole catalogue, just the top 100 SKUs. Only after the team saw the engine run calmly and transparently did the next 400 follow. By week six the entire marketplace assortment was automated — and the weekend repricing shift has been history ever since.
What measurably changed.
Results after 8 weeks of full operation — measured against the 8 weeks before Mercurios.
+18 %
marketplace margin on average
+12 pp
Buy-Box share across the top 300
5 min
Buy-Box refresh at peak
0
catastrophic price-break events thanks to Sentinel
−92 %
manual interventions per week
+28 %
visibility on hero products
„What convinced us wasn't the repricing engine itself — others had that too. It was Sentinel. For the first time I could sleep at night, because I knew that if anything drifts, the system stops itself. The +18 % margin was the logical consequence of no longer needing panic corrections."
Marketplace lead
Marketplace specialist · ~1,200 ASINs
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