http://www.kickstarter.com/projects/1992078142/building-the-open-source-bussard-fusion-reactor
I don't know if this could be considered a 'good deal' but when you
throw in the superconducting polywell research it's a bargain ;-)
There are lots of rewards, but the big one is the reward of advancing
the scope of human knowledge through peer-funded open research. Worth
checking out.
-Sam.