pretty cheap for earphone. are these any good?

I haven't actually tested them, but they fit my ear pretty good, and don't give audible noise when I'm moving around. I think they'll be pretty good for a sport/jogging earphone.

so u have tested them

Testing would imply that I used them to listen to music.

I haven't. I just put them on my ear.

Might be good for gym use. THey'll stay in place and few are concerned about high fidelity while on a cardio exercise machine.

Exactly my thoughts, #5.