Super simple system where as you send item(s) to a bot and every third minute, the bot chooses a winner (randomly) and sends the skins involved with that round to the winner.

For more details, check the "FAQ" of the bot.

Bot 1: http://steamoss.com/id/mathiastradebot/

Note that this is one of the first builds of the bot and it might be buggy/glitchy. Please post any bugs in the forum.