The NBA players wear Beats by Dr.Dre
Skullcandy.com your best bet.
Buy and Amazonm both sell shadow headphones.
If you buy an iPod, headphones will be supplied with it.
Best Buy.
Buy it. - -"
Amazon is a cheap place to buy Skullcandy Crusher headphones. You can buy a pair for $43.99.
One can buy portable headphones at Walmart, Target, Best Buy and Future Shop. It is best to buy good quality portable headphones and one may also find them through Amazon and Ebay.
SlankIT
Regular headphones would do. Headphones that say you can listen to them on a run is a lie, because you can do that with almost any set of headphones, I do when I go on walks.
Check out encoredataproducts.com - they've got earbuds and headphones in bulk.
you can buy BEATS HEADPHONES by going to a WAL-MART near you