Scatterplot for eBay

Scatterplot for eBay adds a price-history panel directly to eBay search pages, so you can see at a glance what items are actually worth before you buy or sell.

Pick the listings you care about and plot their prices on an interactive chart:

• Sold listings are charted by sale date, revealing real price history over time.
• Active listings appear in a separate price-distribution view, sorted by price so clusters and outliers stand out.

Features

• Interactive price chart docked to any edge of the screen (top, right, bottom, or left)
• Per-listing checkboxes to choose exactly which items to include
• "Plot all" to add or remove every listing on the page at once
• Currency conversion: choose a display currency and all prices are converted from their original listing currencies using live exchange rates
• Drag to redock: move the panel to any edge by dragging its header or tab
• Resizable: drag the panel's edge to expand or contract it
• Dark and light themes
• Adjustable text size
• Remembers everything between visits: selections, dock position, theme, font size, and open/closed state are all saved

How to use it

1. Go to any eBay search page, and a small 📈 tab appears on the edge of the screen.
2. Click the tab to open the panel, or just check a listing to open it automatically.
3. Tick the "Plot" box on any listing to add it to the chart, or use "Plot all."
4. Hover over a point to see the item's title and price.