Where is ChatGPT Plus cheapest this week, and which seller actually honors the warranty? Price Comparison (Zhitu Shijia) is a self-hosted platform that gathers AI subscription and account offers from many card shops into one catalog you can search, compare, and question. Tell the built-in guide your budget and need, for example a Plus top-up under a monthly cap with warranty cover, and it filters offers, explains recharge channels and purchase conditions, and narrows the list through follow-up questions. Browse by platform, delivery method, term, and warranty to compare prices and stock for ChatGPT and Codex, Claude, Gemini, Grok, and Cursor offers side by side, including finished accounts, shared accounts, and redeem codes. Price history shows how an offer moved before you buy, and official regional prices give a reference point when a quote looks suspiciously cheap or expensive. Email accounts, SMS verification, and residential IP offers sit in the same catalog, so the extras a subscription needs can be priced in the same pass. Install the comparison Skill or connect the MCP service and your own AI assistant can search products, compare merchant quotes, and pull price history with source links and collection times attached. In the admin console you add and review shops, run collection, and supervise the pipeline that identifies, classifies, and publishes products into the catalog. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. GPL-3.0 licensed.