It is not complete if you buy iPod without the headphones. Here one of any headphones that can be your reference.
Apple In-Ear Headphones (White):

  • Sleeker than previous models
  • Great sound quality and bass response
  • Fit comfortably in your ears
  • Universal accessory for all iPod models as well as all digital audio players compatible with 3.5-mm mini-jac

Compatible with all Apple iPods and digital players that work with a 3.5-millimeter mini-jack, the Apple MA662G/A Headphones are designed for comfort. This universal accessory has a sleek design and delivers crystal clear sound quality and bass response, whether you're listening to your favorite tunes while working at your desk, running on the treadmill, or relaxing at home. Compact and ultra-portable, these earbud-style headphones fit easily in your pocket or bag so you can grab them and go.

click picture below for more detail:

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