VaultSeller — eBay Seller Tools

Tracking since Apr 1, 2026.

Changelog

• Jun 13, 2026
  description

  VaultSeller gives eBay sellers the tools that Seller Hub forgot to build — right on the listing page, without opening a spreadsheet.
  
  💰 PROFIT CALCULATOR (Free)
  Know your real profit before you list or buy. VaultSeller auto-detects eBay's fee structure for the current category and pre-fills the selling price from the listing. Just enter what you paid for the item and instantly see:
  • Net profit in pounds
  • Profit margin %
  • ROI %
  • Break-even selling price
  • Full eBay fee breakdown (FVF by category, managed payments fee, optional insertion fee)
  Supports Top Rated Seller 10% discount and all UK store levels (Basic, Featured, Anchor).
  
  📈 SOLD PRICE HISTORY (Free — 30 days | Pro — 90 days)
  See what items actually sell for, not just what sellers are asking. Powered by the official eBay Finding API. For every listing you view, VaultSeller shows:
  • Average, minimum, and maximum sold prices
  • Individual sale records with dates, conditions, and format (auction vs fixed price)
  • Trend chart (Pro)
  Know your market before you list.
  
  🏷 SEARCH RESULT PROFIT BADGES (Free)
  Every listing in your eBay search results gets a live profit badge — green for profitable, amber for marginal, red for a loss — based on your settings. Spot the flips worth pursuing without clicking into every listing.
  
  📊 LISTING SEO SCORER (Pro)
  Score your own eBay listings out of 100. VaultSeller analyses title quality, description completeness, image count, and pricing strategy, then gives you specific, actionable recommendations to improve your search ranking and conversion rate.
  
  👁 COMPETITOR WATCHLIST (Pro — up to 50)
  Add competitor sellers or specific listings to your watchlist. VaultSeller checks for price changes and new listings daily in the background and shows alerts in your dashboard the next time you open the extension.
  
  🏪 SELLER HUB ENHANCEMENT (Free — 10 rows | Pro — all rows)
  Injects a "VS Profit" column directly into your eBay Seller Hub active listings table. See estimated net profit for every item without opening each listing individually.

  VaultSeller is the free alternative to Terapeak, ZIK Analytics, and Salecalc for eBay UK sellers. It lives directly inside eBay — no switching tabs, no subscription required for core features — and gives you powerful tools that eBay Seller Hub doesn't include.
  
  Version 2.0 adds five major new features: AI listing generator, VeRo brand checker, shipping calculator, bulk actions and real eBay analytics.
  
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  🤖 AI LISTING GENERATOR
  Paste your current title, hit Generate. Claude AI writes an SEO-optimised title (up to 80 characters, front-loaded keywords) and a persuasive 3–5 sentence description — directly on the eBay listing create and edit page. Applies to the form with one click.
  • Free: 5 generations per month
  • Pro: Unlimited
  
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  🛡️ VERO BRAND CHECKER
  Checks your listing title against 150+ brands in eBay's Verified Rights Owner (VeRo) programme before you hit publish. High / Medium / Low risk levels shown with colour-coded badges. Catches problems before eBay does.
  • Free: all listings, all risk levels
  
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  📦 SHIPPING CALCULATOR
  Enter item weight and compare Royal Mail (17 services), Evri and DPD rates side by side — sorted cheapest first. Tracked vs untracked, delivery times included. "Use" button fills in the postage field on the listing form instantly.
  • Free: all carriers
  
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  💰 PROFIT CALCULATOR
  Real-time profit, margin, ROI and break-even on every eBay listing. Full UK fee engine including:
  • Final Value Fee by category (with motors cap)
  • Managed Payments (2.7% + £0.30)
  • Store subscription discounts (Basic through Enterprise)
  • Top Rated Seller 10% FVF discount
  • Break-even selling price
  
  Auto-fills the selling price from the page. Type freely — no cursor jumping.
  • Free: full calculator
  
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  🔄 BULK ACTIONS — Seller Hub
  Checkboxes injected into your Seller Hub active listings table. Select multiple listings and relist or end them all in one click. No more clicking row by row.
  • Pro only
  
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  📊 REAL EBAY ANALYTICS — Seller Hub
  Connect your eBay seller account (secure OAuth) to see actual transaction data from eBay's Finances API: real fees charged, real net payout, and a 30-day revenue chart. No estimates, no approximations.
  • Pro only
  
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  🏪 SELLER HUB PROFIT COLUMN
  A "VS Profit" column injected into your Seller Hub active listings table — net revenue and effective fee rate for every item.
  • Free: first 10 rows
  • Pro: all rows
  
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  👁 COMPETITOR WATCHLIST
  Monitor up to 50 competitor sellers or listings. Daily background checks detect price changes and new listings. Alerts appear in your dashboard.
  • Pro: up to 50 items
  
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  FREE vs PRO
  
  Free — profit calculator, VeRo checker, shipping calculator, AI listings (5/month), Seller Hub profit column (10 rows), sales snapshot
  Pro — unlimited AI, real eBay analytics, bulk actions (relist/end), all Seller Hub rows, competitor watchlist (50 items), listing SEO scorer — £9.99/month or £79/year. Cancel anytime.
  
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  PRIVACY
  
  VaultSeller does not sell your data. All calculations run locally in your browser. The AI feature sends only your listing title to our secure Cloudflare server — nothing else. Your eBay account connection uses standard OAuth — we never see your eBay password. Full

• Jun 13, 2026
  host_permissions

  https://*.ebay.co.uk/*, https://*.ebay.com/*, https://*.ebay.com.au/*, https://*.ebay.ca/*, https://svcs.ebay.com/*, https://svcs.sandbox.ebay.com/*

  https://*.ebay.co.uk/*, https://*.ebay.com/*, https://*.ebay.com.au/*, https://*.ebay.ca/*, https://vaultseller-ai.nickirough.workers.dev/*, https://vaultseller.co.uk/*, https://vaultseller-5b59b.web.app/*

• Jun 13, 2026
  permissions

  storage, activeTab, alarms, notifications

  storage, alarms, notifications

Permissions & access

Permissions

storagealarmsnotifications

Host access

https://*.ebay.co.uk/*, https://*.ebay.com/*, https://*.ebay.com.au/*, https://*.ebay.ca/*, https://vaultseller-ai.nickirough.workers.dev/*, https://vaultseller.co.uk/*, https://vaultseller-5b59b.web.app/*

Screenshots