By Rob Fogarty, Amazon FBA seller (OA and wholesale) and founder of Opero3P · October 2026
I went back and forth between repricers for a long time. Aura, BQool, SmartRepricer, then back again, each time hoping the next one would finally do what I needed.
The problem was never that they didn't work. They did what they were built to do. The problem was that I'd figure out a strategy that I knew would win the Buy Box on my listings, ask for it, and get some version of the same answer: we don't support that.
So I built my own repricer, one where the strategy is whatever I need it to be. This article is what I learned along the way: the most common ways repricers quietly cost sellers money, and what to look for so yours doesn't.
1. Your floor is out of date, so you win the Buy Box at a loss
Every repricer has a minimum price, or "floor." The repricer will never go below it. The trouble is that you usually type it in once.
Then your costs change. You buy the next batch at a different price. Prep fees go up. Freight on this shipment was more expensive. Amazon's fees shift. Your floor doesn't know any of that, so the repricer happily drops to a price that used to be profitable and wins the Buy Box at a loss.
What to look for: a repricer whose floor comes from your real landed cost per unit (what you actually paid, plus prep and shipping, plus Amazon's fees) and updates when those change. In Opero3P, floors are recalculated from your actual purchase costs, and you can set a minimum profit in dollars or ROI per product, so a cost change can't silently turn a sale into a loss.
2. The race to the bottom
Two repricers set to "beat the lowest price by a cent" will chase each other down until both sellers are at the floor. Nobody wins except the customer.
What to look for: strategies that don't always undercut. Sometimes the smart move is to match the Buy Box, or hold your price and let the other seller sell through their stock. A good repricer should recognize a crowded listing (lots of Prime sellers within a cent or two of each other) and stop undercutting there.
3. It can't see when to go up
Most repricers are built to go down. But some of the best money in arbitrage is made when competitors run low on stock or drop out. If the only other FBA seller has three units left and sells ten a day, you shouldn't be sitting at the floor.
What to look for: a repricer that reads competitors' stock levels and sales speed, and knows when there's room above the Buy Box. It should also handle sellers who hide their real quantity (showing "30+"), because those are the ones that can bury you if you price up too far.
4. Strategies you need that aren't on the menu
This was my biggest frustration. A few examples of strategies I wanted and couldn't get:
- Overnight lift: nudge the price up at night when competition is quieter, then go back to normal in the morning.
- Hold while inbound: keep my price above the Buy Box while my stock is still on its way to Amazon and not yet Prime, instead of racing other sellers with stock I can't ship yet.
- Hold, then reprice: keep a new product at full price for 30, 45 or 60 days before letting the repricer touch it.
- Suppressed Buy Box recovery: when Amazon suppresses the Buy Box because prices look too high, step down until it comes back, then work back up to the highest price that still holds it.
- Yo-yo: briefly dip below the lowest seller to grab the Buy Box, then come back up, so you get sales at both prices on fast-moving items.
- "Go get sales": when a product hasn't sold in a while, find the price that wins the Buy Box without going below break-even.
When the answer to "can you build this?" is no, you're stuck pricing the way the software thinks you should.
What to look for: a repricer that lets you build your own rules (when this happens, do this, within these limits) and mix strategies by product and even by time of day. That's what I built into Opero3P, and I keep adding strategies as sellers ask for them.
5. No guardrails, no history
A repricer can make dozens of changes a day across your catalog. If you can't see what it did and why, you can't trust it, and you can't catch a bad rule before it costs you.
What to look for:
- A change log showing every price change, why it happened, and a one-click revert.
- Daily limits on how many times and how far a price can move.
- A kill switch to pause everything instantly.
- A check that stops it acting on stale data.
What I use now
Opero3P's repricer is built around the problems above:
- Floors from your real landed cost, plus a minimum profit in dollars or ROI per product, kept separate from your sourcing criteria, because things change between buying and selling.
- Strategies: Match Buy Box, Room above Buy Box, undercut, hold-then-reprice, hold while inbound, suppressed Buy Box recovery, Go get sales, yo-yo, a learning mode that tests prices to find where the Buy Box is won, and your own custom rules.
- Schedules: run a different strategy at different times of day, like an overnight lift.
- Per-product control: turn repricing on or off product by product, with ROI and profit shown at the current price, or bulk-set a strategy across many.
- Guardrails: a full change log with revert, daily movement limits and a pause switch.
And because it's part of the same system as your purchases and P&L, it knows your real cost without you typing it in.
If there's a strategy you've been told can't be built, tell me. That's exactly how most of these got added.
FAQ
Why does my repricer sell below cost? Usually because the floor was set once and your costs changed since: a pricier batch, higher prep or freight, or fee changes. Use a repricer whose floor is calculated from your actual landed cost and updates with it.
Should I always undercut the lowest seller? No. On crowded listings, undercutting just starts a race to the bottom. Matching the Buy Box, or holding while a competitor sells out, often makes more money.
Can a repricer raise prices too? Good ones can. Look for one that reads competitors' stock and sales speed and raises your price when they're running low.
What is a yo-yo repricing strategy? Briefly dropping below the lowest seller to win the Buy Box and make a sale, then returning to your higher price. It can work on fast-moving items but needs daily limits so it doesn't run away.
What should I do when Amazon suppresses the Buy Box? Step your price down gradually until the Buy Box returns, then raise it back toward the highest price that still keeps it. Doing this by hand is slow; a repricer can do it automatically.
Can I set different repricing strategies for different times of day? With some repricers, yes. Opero3P lets you schedule strategies, such as a higher price overnight and your normal strategy during the day.
Opero3P is my company. Aura, BQool and SmartRepricer are solid repricers that work well for many sellers; this article is about the strategies I personally needed and couldn't get.