I want to make a kief tumbler

[Bender]

I have less than $20 in mine and it works great..

I got my screen on ebay.. http://cgi.ebay.com/ws/eBayISAPI.dll...MEWN%3AIT&rd=1

for a motor I used the oscillating motor out of a fan(not the motor that turns the blade but the motor that makes the fan turn back and forth) the output is about 4 or 5 RPM.

these things are easy to build and there is no reason to pay a lot of money for one...