These are awesome headphones. I was checking them out to buy for a friend's going away present and got lucky with my timing. The CX-150 are onsale for around $25 too, plus god knows how much other stuff.
Offering a powerful, bass-driven stereo sound with greater clarity and improved dynamics are the Sennheiser In-ear earphones. The various sizes of ear adapters provided, allow for a personalised fit as well as a high passive attenuation of ambient noise.
Features:
Powerful, bass-driven stereo sound
Perfect fit in the ear canal due to ear adapters in different sizes
Excellent attenuation of ambient noise
Extremely small and lightweight
Ideal for use with all MP3, CD, DVD, MD players and portable game systems with 3.5 mm headphone sockets
Asymmetrical cable
2-year warranty
I think $30.95 was Dicky's lowest price. Though this is still a great price!