sell_same_items_steam.js

const getIds = selector => {
    selector = selector || `[src= "https://community.akamai.steamstatic.com/economy/image/-9a81dlWLwJ2UUGcVs_nsVtzdOEdtWwKGZZLQHTxDZ7I56KU0Zwwo4NUX4oFJZEHLbXU5A1PIYQNqhpOSV-fRPasw8rsUFJ5KBFZv668FFUxnaPLJz5H74y1xtTcz6etNumIx29U6Zd3j7yQoYih3lG1-UJqY27xJIeLMlhpaD9Aclo/96fx96f"]`

    const arr = document.querySelectorAll(selector)
    const ASSETID_RE = /(?<=\d+\_\d+\_)\d+/
    
    return Array
        .from(arr, a => a.parentElement?.id?.match(ASSETID_RE)?.[0])
        .filter(Boolean)
}

const sellItem = id => {
    return fetch("https://steamcommunity.com/market/sellitem/", {
  "referrerPolicy": "strict-origin-when-cross-origin",
  "body": `sessionid=${document.cookie.match(/(?<=sessionid=)\w+/)[0]}&appid=730&contextid=2&assetid=${id}&amount=1&price=${price}`,
  "method": "POST",
  "mode": "cors",
  "credentials": "include"
}).then(a => a.json())
}

const sellItemsById = async (ids = getIds(), price = 800) => {
    const res = []
     for (const id of ids){
        res.push(await sellItem(id))
    }
    return res
}