How much do Zunes cost at Wal-Mart?

I CAN'T LIVE WITHOUT ONE! It's just so upsetting going to/walking from my sucky school without music, you know? I just NEED music. I wanted to know how much it costs to buy the 4 GB Zunes at Wal-Mart. I have heard that they are $150.00 for the 4GB. Can you tell me how much you bought yours for, and whether or not it is worth it? I really don't want my dad to spend TOO much on me like those crazy $300 priced ones, you know? Anyways, thanks for the help!