Small tool I use to keep track of BeybladeX prices across HK and JP marketplaces (Carousell, Yahoo Auction JP, Mandarake, Mercari).
It is manual: paste a listing URL, the price I saw, what Bey it is. The app shows me the cheapest historical entry per Bey, so I can decide if a current listing is fair.
No scraping. The marketplaces do not love it, and honestly entering things by hand keeps the dataset small enough to stay useful.
npm install
npm run dev