What brand and what country are you from? we can't answer your question because we don't know your details. if you like in general MP3's from the US is around $20 to $30.
no, mp3 players are much better quality than mp3 pens. they are also able to hold much more storage space than any mp3 pen will be able to store on them.
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Truthfully, a decent MP3 player costs $100+.
The esitmated weight of mp3 glasses are around 0.5 KG. http://www.mp3playerbuying.com/mp3-players-sunglasses-mp3-players-c-2151_2144.html Also they wont be much of an effect on running unless you got a big head.
it depends on how much GB it has if it has only MB it is a bad MP3 player
No. iPods are much more better than MP3 players.
Not much since other mp3s beside Apple iPods hold about 25% of the mp3 market share. And also cars pollute way more than mp3 companies.
mp3
It cost about 104.00
it costs $199 USD
nope
well there are many types of mp3 player...depending on what model n how much gb you want..plus how much u are willing to pay