Newegg.com has a Monster Cable RadioPlay Car Stereo Wireless FM Transmitter for $9.99 with Free Shipping.
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- Easy one-button FM channel selection with eight available channels. n
- 24k gold contacts for maximum corrosion resistance and power transfer. n
- Plugs into your car’s 12v cigarette lighter. No batteries required. n
- Smart Digital ChargerTM for fast charges and maximum battery life n
- Transmitter utilizes FM channels: 88.1, 88.3, 88.5, 88.7, 88.9, 89.1, 89.3, 89.5