IMHO, this is a terrible idea and you won't get backed.
Also, your little prizes suck
Hand signed certificate? Those are just the computer generated ones right?
No one will donated 250 dollars just to have their name on a GPU or whatever
No one will donated OVER 250 when they literally acquire nothing.
I won't donate to this because I'm not getting any returns. All I would get are some lousy emails, certificates, and my name etched on something I'll never have.
200-300 dollars cases? dumb, could get a much cheaper case and put more money towards GPUs or CPUs
An assortment of mobos (2011, 1155, and AM3+?), just choose a platform and stay with it
GPUs, holy crap. 1 690 and 4 580s? and plus 8 680s and 5 7970s?
CPUs, you get an extreme edition and cheap out for a 3930k on the other?
Assortment of ram and assortment of other stuff
Seems like you're just trying to fund a hobby.
I wouldn't donate a dime.