Individuals play Second Life first by purchasing a sleeping helmet which is specifically designed to work for the individual for which it was created. The cheapest one can find these are about $1000. Headsets this inexpensive are generally used sets which have been reconfigured to work for a new person. New headsets are around $2000. The technology which allows people to extend their dreaming consciousness through the headsets and to the world of Second Life while they sleep is kept a secret by ThinkExist. It spends large sums of money towards protecting the technology and research behind their success from competing companies.