ASINMonster — Amazon FBA Arbitrage & Price Tracker

ASINMONSTER — Amazon Price Tracker, Cross-Marketplace Arbitrage Tool & FBA ROI Calculator ASINMONSTER is a fast, lightweight Chrome extension built for Amazon Online Arbitrage (OA) and Retail Arbitrage (RA) sellers, FBA/FBM merchants, wholesale buyers, and cross-border resellers. It combines real-time Amazon price tracking, Buy Box monitoring with price drop alerts, cross-marketplace price comparison (CrossScan), landed-cost ROI calculation, Keepa CSV import, and Telegram notifications in one workspace. Your product lists, scan results, and settings are stored locally in your browser. Account and license checks run over secure HTTPS with asinmonster.com. No analytics SDKs, no ads, no remote code. Whether you source discounted products on Amazon.com to resell on Amazon.co.uk, Amazon.de, Amazon.ca, or Amazon.co.jp, monitor daily Buy Box changes, or evaluate bulk sourcing spreadsheets, ASINMONSTER gives you the speed and analytical depth to run a professional sourcing operation. ========================================= 1. SUPPORTED AMAZON MARKETPLACES ========================================= Native price extraction across 5 marketplaces: - Amazon.com (US) — primary sourcing market - Amazon.co.uk (UK) — European hub with VAT-aware ROI - Amazon.de (DE) — central European demand - Amazon.ca (CA) — North American cross-border - Amazon.co.jp (JP) — Pacific marketplace Each marketplace module handles regional currency ($ USD, $ CAD, £ GBP, € EUR, ¥ JPY), delivery postal codes, local tax settings, and regional fee schedules. ========================================= 2. CORE FEATURES ========================================= FEATURE 1 — AMAZON PRICE TRACKER & BUY BOX MONITOR - Continuous Buy Box price tracking: live prices, 3P offers, Amazon-as-seller status, and availability - Target price alerts: set multiple target buy prices per ASIN and get notified when a price drops to or below your threshold - Instant Chrome desktop notifications and optional Telegram push alerts for price drops and back-in-stock events - Price history and trends (30/90/180 days), seller counts, and stock status to avoid overcrowded listings - Multi-store workspaces: organize watchlists by store profile with priority levels (HOT, WATCH, SKIP), tags, and notes FEATURE 2 — CROSSSCAN: CROSS-MARKETPLACE PRICE COMPARISON CrossScan compares a source marketplace against a target marketplace in parallel, replacing dozens of manual tabs: 1. Open ASINMONSTER and go to the CrossScan tab 2. Select source (e.g., Amazon.com) and target (e.g., Amazon.de) 3. Set the destination postal code for localized Buy Box prices 4. Paste one ASIN or a full list into the scan queue 5. Start the scan — results land in a filterable comparison matrix CrossScan opens target product pages in background tabs, extracts Buy Box price, stock status, and offers, and aggregates everything with pagination for smooth performance on large lists. FEATURE 3 — LANDED-COST FBA / FBM ROI CALCULATOR A full cost engine that covers the hidden fees in the arbitrage chain: - Purchase price and source sales tax (US state-level rates) - International route shipping (per-kg or per-unit) - Prep, labeling, and polybagging costs - FBA storage and handling fees - Amazon referral fees by category - FBA fulfillment fee estimates - VAT handling (Fee-Only VAT and Standard VAT schemes for Europe) - Outputs: net profit, ROI %, and net margin in your target currency Every parameter is customizable in ROI Settings, so formulas match your prep center rates and freight contracts. FEATURE 4 — KEEPA CSV IMPORT & BSR ANALYSIS Turn Keepa exports into profit-calculated sourcing lists: - Import native Keepa CSV exports directly - Automatic field mapping: ASINs, titles, images, Buy Box prices, 30/90/180-day BSR drops, seller counts, variation data - Batch ROI calculation over thousands of rows using your saved cost assumptions - Export enriched results to CSV (works with Excel, Numbers, and Google Sheets) No Keepa subscription is required for ASINMONSTER itself. FEATURE 5 — ASIN COLLECTOR & TELEGRAM ALERTS - One-click ASIN collector on Amazon search results, best-seller lists, storefronts, and category pages - ASIN extractor for messy URLs and raw text blocks (clean + deduplicate in seconds) - Telegram bot notifications: enter your own Bot Token and Chat ID to receive price-drop and scan alerts on your phone ========================================= 3. WHY A BROWSER EXTENSION? ========================================= Unlike expensive desktop suites and heavy monthly subscriptions, ASINMONSTER runs locally in your browser: - Your sourcing data stays on your device (local-first storage) - No per-lookup pricing — transparent free and Max plans - Purpose-built for arbitrage, wholesale, and FBA reselling instead of private-label research - Fast parallel scanning with rate-limit protection to keep Amazon sessions safe ========================================= 4. WORKFLOWS ========================================= WORKFLOW A — CROSS-BORDER ONLINE ARBITRAGE 1. Find discounted products on Amazon.com 2. Collect ASINs with the one-click collector 3. CrossScan against Amazon.co.uk or Amazon.de 4. Enter your prep and freight assumptions in ROI Settings 5. Identify listings where the European Buy Box price yields strong ROI after shipping, prep, and VAT 6. Export profitable deals to CSV and order inventory WORKFLOW B — BUY BOX PRICE DROP MONITORING 1. Add candidate ASINs to your watchlist 2. Set target buy prices per item 3. Enable background monitoring and connect Telegram 4. Get instant alerts when a price hits your threshold or stock returns WORKFLOW C — KEEPA BULK SOURCING 1. Export a category list from Keepa as CSV 2. Drop the file into the Keepa ROI tool 3. Review auto-calculated profit, ROI %, BSR drops, and seller counts 4. Filter for your ROI and BSR criteria, then export your purchasing list ========================================= 5. TAX & LOGISTICS CONTROLS ============…