// ==UserScript==
// @name        Steam Flash Sale
// @namespace   com.natemara.flash-sale
// @description Quickly sell your steam items
// @include     /https?://(www\.)?steamcommunity\.com/market/.*/
// @version     3
// @grant       none
// ==/UserScript==

var itemPattern = /Starting at: $[0-9.]+/;

function getPrice() {
	var matches = document.documentElement.innerHTML.match(itemPattern);
	var itemPrice = document.getElementById("iteminfo1_item_market_actions");
	console.log(matches);
}

setInterval(function() {
	getPrice();
}, 5000);

@@ -23,16 +23,10 @@
 name
-        
+%09%09
 Stea
@@ -51,19 +51,17 @@
 amespace
-   
+%09
 com.nate
@@ -91,17 +91,17 @@
 cription
- 
+%09
 Quickly 
@@ -133,21 +133,18 @@
 @include
-     
+%09%09
 /https?:
@@ -195,21 +195,18 @@
 @version
-     
+%09%09
 3%0A// @gr
@@ -212,23 +212,18 @@
 rant
-       
+%09%09
 none%0A// 
 ==/U
@@ -222,24 +222,126 @@
 %0A// 
-==/UserScript==%0A
+@require%09%09http://ajax.googleapis.com/ajax/libs/jquery/1.2.6/jquery.js%0A// ==/UserScript==%0A%0Avar $ = unsafeWindow.jQuery;
 %0Avar
@@ -494,31 +494,9 @@
 e = 
-document.getElementById
+$
 (%22it
@@ -539,23 +539,25 @@
 ole.log(
-matches
+itemPrice
 );%0A%7D%0A%0Ase

add jquery to script