Product Sourcer — Overview

SellerMagnet’s Sourcer helps you evaluate any Amazon product in depth: analyze product data, competition, costs, and potential profitability. It centralizes the key metrics that sourcing teams need to decide whether to source, scale, or skip a product.

Quick Start

  1. Search by ASIN/EAN/ISBN or Product Name Enter the product code or name in the Search Bar at the top. Choose the desired Marketplace from the dropdown and click Search to pull product data.

  2. Chrome Extension Integration The Chrome badge in the top-right lets you install and connect the Sourcer Extension. This enables direct analysis from any Amazon product page.

Hint: Use ASINs when possible. Searching with the exact child ASIN avoids confusion with variations that might have very different rank, reviews, or pricing.

Sourcer — History screen showing a chronological list of previously checked products with picture, title, ASIN and timestamp

Details Overview (Main Screen)

Once you run a search, the Details Overview shows four main blocks of information:

Sourcer — Full Details Overview screen with Product Info, Profit Calculator, Offers and Graphs

1) Product Information

  • Product Title and Image: Identify the exact product.

  • ASIN: Unique identifier on Amazon.

  • Rating & Reviews: Average customer rating and total number of reviews.

  • BSR (Bestseller Rank): Indicates the relative sales velocity in the product’s main category. Lower rank = higher sales volume.

  • Est. Sales: Estimated monthly sales, based on BSR trends.

  • Max Cost: The highest unit cost you can pay while still maintaining a non-negative ROI at current BuyBox price.

  • BuyBox Price: The current price holding the BuyBox.

  • Amazon’s Price: If Amazon Retail is a seller, their listed price.

  • Lowest FBM / Lowest FBA: Lowest offers per fulfillment method.

  • BuyBox Share: Indicates which sellers (Amazon or third-party) have been winning the BuyBox.

  • Private Label: If the listing is controlled by a brand owner (harder to compete).

  • Offers: Number of sellers on the listing.

  • Stock: Combined inventory count across sellers.

  • Variations: Flags if there are multiple variations (size, color, bundle).

  • Eligible: Whether your account can sell the product.

  • HazMat: Hazardous materials classification.

Sourcer — Product Information card with ASIN, reviews, BSR, estimated sales, Max Cost, BuyBox price, Amazon’s Price, FBA/FBM offers, eligibility and hazard indicators

Always use Max Cost as your ceiling during supplier negotiations. Add a buffer for inbound shipping, prep and FBM logistics to avoid margin erosion.

2) Profit Calculator (FBA/FBM)

The Profit Calculator estimates profitability at your given cost and sale price.

  • Cost Price: Net cost you pay per unit.

  • Sale Price: Gross selling price on Amazon.

  • Fulfillment Type: Switch between FBA or FBM.

  • FBM Cost: Additional per-unit fulfillment cost (only when FBM selected).

  • Maximum Cost: Max allowable purchase cost for break-even.

  • Total Fees: Amazon referral + fulfillment fees.

  • VAT Due: Value-added tax on the sale.

  • Breakeven Sale Price: Price required to cover all costs.

  • Estimated Amazon Payout: Net payout from Amazon after fees.

  • Estimated Profit, Profit Margin, ROI: Core profitability indicators.

Sourcer — Profit Calculator configured for FBM with custom FBM cost, showing payout, ROI, breakeven price and net profit
Sourcer — Profit Calculator configured for FBA with Amazon fees, payout estimate, ROI and profit margin

Warning: Fee estimates are sensitive to category, size and weight. Unexpected results? Double-check the product dimensions and weight tier in Seller Central.

3) Offers (Competition Table)

The Offers table lists all sellers for the product:

  • Fulfillment: Whether the seller uses FBA or FBM.

  • Seller: Seller name.

  • Price: Listed selling price.

  • Stock: Units available from that seller.

Sourcer — Offers table comparing FBA/FBM sellers, their prices and available stock

Caution: Listings with many FBM sellers and falling prices often signal a price war. High-stock FBA sellers can also create price floors.

4) Graphs

The lower panels show historical trends:

  • BSR History: Demand trends over time.

  • Price History: Price volatility and floors/ceilings.

  • Monthly Sold: Estimated sales volume by month.

  • BuyBox Share: Which seller won the BuyBox and when.

Sourcer — Graphs panel with BSR history, Price history, Monthly sold, and BuyBox share distribution

Hint: Always read BSR trend (demand) together with Price History (margin stability) and BuyBox Share (competition intensity) before buying stock.

Sourcer Legend (Field Definitions)

Sourcer — Legend explaining BSR, Estimated Sales, Max Cost, BuyBox Price, Amazon’s Price, Lowest FBM/FBA, BuyBox Share, Private Label, Offers, Stock, Variations, Eligible, HazMat

  • BSR (Bestseller Rank): Ranking within the main category, updated hourly, reflecting sales performance.

  • Estimated Sales: Calculated monthly sales estimate derived from BSR data.

  • Max Cost: The maximum sourcing cost allowed to avoid negative ROI.

  • BuyBox Price: Price currently holding the BuyBox.

  • Amazon’s Price: The price Amazon Retail lists if they sell the product.

  • Lowest FBM / Lowest FBA: Lowest market offers split by fulfillment method.

  • BuyBox Share: Distribution of BuyBox wins among sellers over the last 30 days.

  • Private Label: Indicates brand-owner control (reduced competition opportunity).

  • Offers: Total number of sellers on the listing.

  • Stock: Combined seller inventory available.

  • Variations: If the listing has multiple SKUs (size, color, bundle).

  • Eligible: Whether your account is allowed to sell.

  • HazMat: Amazon hazardous material classification.

History (Recall Past Checks)

The History Section keeps track of all recent searches, with:

  • Picture of the product.

  • Title of the product.

  • ASIN (unique identifier).

  • Timestamp when search was performed.

This lets you revisit products without retyping details.

Sourcer — History list showing previous product lookups with thumbnails, ASINs and timestamps

Practical Workflows

  • Quick Viability Check: Look at Max Cost, run both FBA and FBM in the Profit Calculator, scan Offers and BSR trend. If unprofitable, move on.

  • Price War Detection: Combine Price History + Offers growth. If margins are collapsing, avoid or limit buy-in.

  • Replenishment Decisions: Use Monthly Sold vs. your stock to plan reorder points.

Hint: Always screenshot Offers before sourcing. If competition floods later, you’ll know how the seller landscape changed.

Common Pitfalls

  • Mistaking Max Cost as “safe buy price” without adding your unique costs (FBM shipping, 3PL, prep).

  • Ignoring Variations: one child ASIN may be high volume, another may be stagnant.

  • Overreacting to spikes in Monthly Sold without checking if it was promo-driven or seasonal.

Troubleshooting

  • Unexpected fees/payouts? Recheck product size tier and fees in Seller Central.

  • Ineligible? See Eligible status and Amazon’s brand/category gating rules.

  • HazMat flagged? Verify if FBA storage is allowed in your region.

With Sourcer, you get a full picture of demand, pricing, competition, and profitability in one dashboard, making sourcing decisions faster and safer.

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