Fast sell Steam inventory items for the lowest market price

steam-fast-sell.user.js

// ==UserScript==
// @name Steam Fast Sell
// @include  http*://steamcommunity.com/profiles/*/inventory*
// @include  http*://steamcommunity.com/id/*/inventory*
// @description Fast sell Steam items with current price
// @version 2
// @updateURL https://gist.github.com/kyuucr/84c2d99ea09a65fc904a6e40358171c2/raw/steam-fast-sell.user.js
// @namespace kyuucr-steam-fast-sell
// ==/UserScript==
// 
// Based on https://greasyfork.org/en/scripts/6211-fast-sell-steam/ with fixes
// 
(function (window, undefined) {
  var w;
  if (typeof unsafeWindow != undefined) {
    w = unsafeWindow
  } else {
    w = window;
  }
  if (w.self != w.top) {
    return;
  }
  jQuery(document).ready(function ($) {
    $('.item_desc_content').append('<a class="item_market_action_button item_market_action_button_green fs">' +
                                   '<span class="item_market_action_button_edge item_market_action_button_left"></span>' +
                                   '<span class="item_market_action_button_contents">FAST SELL</span>' +
                                   '<span class="item_market_action_button_edge item_market_action_button_right"></span>' +
                                   '<span class="item_market_action_button_preload"></span>' +
                                   '</a>');
    $('.fs').on('click', fastSell);
  });
}) (window);

function fastSell() {
  inf = jQuery('div.inventory_iteminfo:visible').find('.item_market_actions').text();
  expr = /(?:\d+[\., ]?)+/;
  price = expr.exec(inf);
  price = price[0];
  SellCurrentSelection();
  document.getElementById('market_sell_buyercurrency_input').value = price;
  SellItemDialog.OnBuyerPriceInputKeyUp();
  document.getElementById('market_sell_dialog_accept_ssa').checked = true;
  document.getElementById('market_sell_dialog_accept').click();
  document.getElementById('market_sell_dialog_ok').click();
}