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
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.
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.
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.
