Automated TF2 trading site. Sellers create virtual shops where the site's bots run the actual trading aspect. Not quite to the same amount of automation as tf2wh, but, if the buyer and seller agree on the price, a quick way to trade.
An automated Steam trading service achieved by the use of trading bots. Sellers deposit items to the bots and set a price tag. Interested buyers willing to meet their asking price purchase items directly from the bots.