Originally Posted by mastershake916
Can anyone recommend a cheap (maybe $30) bike lock?
Where do you live and where will you be locking your bike? This has a lot to do with what kind of lock you buy.
In general the Onguard brand of locks tend to be less expensive than Kryptonite, but just as good for 99.9% of people.
EDIT: After having the locking mechanism freeze on three Onguard locks I rescind the above statement.