http://cr32ayku2clbunoltzo5uxmwxfmzkcqftf5k4ewyflx6ag2nnvx7mrid.onion
If you send $300 worth of bitcoins to the Dark Mixer, and withdraw in smaller parts of for example $50, $100, $80, then there will be no possibility at all to even guess which transaction is yours, and which belongs to another user. Why most other mixers are NOT safe at all: 1. If they are on the clearweb, then they will be seized sooner or later, like for example bestmixer.