Motorola's buds are pretty popular. Actually this form factor is becoming very popular as of late. LG also has a few headphones like this. But right now, Groupon has the Motorola Buds SF500 on sale for just $49.99. They are available in both black and white as well.
"Lightweight earbuds with built-in mic produce HD sound; and strong wireless connectivity lets you roam up to 150ft. from your device"
You can grab them from the link down below.