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After photo analysis completes, fires a background request to the eBay Browse API (app-level auth, no user login needed) to fetch current Buy It Now prices for similar items on eBay UK. - EbayAuthService.GetAppTokenAsync(): client credentials OAuth flow, cached for the token lifetime - EbayPriceResearchService: searches /buy/browse/v1/item_summary/search filtered to FIXED_PRICE + EBAY_GB, returns min/max/median/suggested (suggested = 40th percentile — competitive but not cheapest) - PhotoAnalysisView: shows spinner + "Checking live eBay UK prices…", then updates price badge, range bar and PriceOverride with real data, plus a "Based on N live listings (£X – £Y)" label Silently degrades if eBay credentials are not configured. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>