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Study Finds 38% of eBay Sold-Listing Rows Filtered Out Before Price Analysis

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A 100-product study run through the CompSniper sold-price API found that relevance cleaning removed 37.87% of raw eBay sold-listing rows, reducing 19,220 parsed rows to 11,942 usable ones. The study covered five categories — smartphones, gaming, cameras, audio, and collectibles — each with 20 products, all queried under identical settings on eBay.com. Of the 100 products tested, 34 saw their median sale price shift by at least 10% after cleaning, with changes moving in both directions: 73 medians rose and 21 fell. The largest swing was a 283% increase for the GoPro Hero 12 Black, while the Google Pixel 7 Pro saw the steepest drop at nearly 53%. Collectibles and luxury items had the highest removal rate at 47%, though the median absolute price change across all categories remained modest at 4.2%, suggesting noise listings often cluster near the product's actual price range.

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Study Finds 38% of eBay Sold-Listing Rows Filtered Out Before Price Analysis · ShortSingh