First off - http://www.head-fi.org/t/596233/buying-portable-or-in-ear-headphones-seeking-guidance-dont-start-a-new-thread-ask-for-advice-here
Anyways, <$75, accurate (although a few more details in terms of signature, or even build, isolation, comfort, etc, would also be helpful) - could check out the E30 or the GR04 for starters. Also the VC02 to consider although have not heard that personally (ljokerl has a very nice review on the Multi-IEM thread linked).
If you can stretch that budget a tad bit, it'd also open you up to more choices with the (assuming) sort of sig you're looking for - i.e. the PFE012, RE-400, HF5, R-50, A161P, etc, etc.