Cheapest way to lauch 0,8kg out to space?

[Mech_Engineer]

Please refer to this New Scientist article from 2004:

An amateur rocket called GoFast has made history by becoming the first such rocket to reach 100 kilometres altitude - the official edge of space.

The seven-metre-tall rocket was launched from Nevada's Black Rock Desert on Monday... The Civilian Space Exploration Team (CSXT) built the rocket at a cost of tens of thousands of dollars. CSXT claims it is the most powerful amateur rocket ever built.
[emphasis added]

http://www.newscientist.com/article/dn5005-first-amateur-rocket-blasts-into-space.html

Note that this rocket wasn't even close to achieving orbit, it just shot straight up to the official edge of space and came back down.