This script is no longer maintained.

I recommend checking out this fork: https://github.com/juliarose/steam-trade-offer-enhancer

Steam Trade Offer Enhancer

Steam Trade Offer Enhancer is a nifty browser script to enhance trade offers available via steamcommunity.com. The script offers features such as auto item adder or quick summaries.

Features

• item auto adder - add multiple items with a single click
• summaries - no need to count those 150 keys anymore
• supports any game or inventory type
• detects item quality, paints
• works with all steamcommunity pages that display trade offers
• automatically adds item if for_item URL parameter is present
• warns user about uncraftable, gifted, restricted items
• warns user about rare TF2 keys
• allows user to remove pending invalid trade offers
• warns user about Escrow period

Installation

1. Install Greasemonkey (Firefox) or Tampermonkey (Chrome).
2. Open the script in raw view.
3. Install.

You can also do the whole git clone procedure if you wish.

Screenshots