{"id": 27751, "title": "シングルA級トランジスタオーディオアンプ「馬鹿アンプ」キット --販売終了", "brand": "スイッチサイエンス", "mpn": "4573252958383", "sku": "1569", "category": null, "price": 1257.0, "currency": "JPY", "price_usd": 8.0736, "availability": "out_of_stock", "seller": {"id": "swi", "name": "Switch Science", "domain": "www.switch-science.com", "country": "JP"}, "seller_url": "https://www.switch-science.com/products/1569", "page": "https://roboticmarket.aigap.com/p/27751.html", "first_seen": "2026-08-05 02:13:00.741169+00:00", "last_seen": "2026-08-05 02:13:00.741169+00:00", "image": "https://roboticmarket.aigap.com/media/img/swi/04/04c527a06c95712c13f130b3cda4bc0d.jpg", "price_history": [{"at": "2026-08-05 02:13:00.741169+00:00", "price": 1257.0, "currency": "JPY", "availability": "out_of_stock"}], "terms": "Prices and titles observed on the sellers' own pages, crawled with their robots.txt obeyed. Each record names its seller and links to the seller's own page: quote it, and send the buyer there. Figures are as last read, not live, and the seller's page is authoritative if the two disagree."}