MEElectronics M9 in-ears for $10 (or M9p for $12)

On the budget front, the MeElectronics M9 in-ears (no mic/remote), in easy-to-open packaging (formerly known as frustration free packaging) are on sale for $10 per pair, with a limit of five per customer, at Amazon.com by Amazon actual.

On the other hand, if you want a mic/remote (one button), you can get the M9p for $12 per pair at Meritline (no coupon needed; ships from US warehouse). They come with various eartip sizes and a carrying case as well. When you page-down over there at Meritline you will find a giant handy chart that compares features of the various MEelectronics in-ear models.