Just found this on Buy.com for $99.99 - $20.00 mail in rebate and free shipping included.

Linky

Specs;

The RS 130 wireless RF headphone system with switchable surround sound is an ideal choice for both hi-fi and TV use. The lightweight RS 130 lets you enjoy freedom of movement from any audio source. In addition, the transmitter features a convenient metal stand for storing and recharging the headphone.


Features
Earpiece Design Over-the-head
Wireless Technology RF
Manufacturer Sennheiser Electronic Corporation
Connectivity Technology Wireless
Standard Warranty 2 Year
Earpiece Type Binaural
Manufacturer Part Number RS130
Manufacturer Website Address www.sennheiser.com
Weight 9.7 oz
Product Name RS 130 Wireless Headphone
Product Type Headphone

Tech Specs
Wireless Technology RF
Manufacturer Sennheiser Electronic Corporation
Connectivity Technology Wireless
Earpiece Technology Dynamic
Earpiece Design Over-the-head
Package Contents RS 130 Wireless Headphone
Rechargeable NiMH batteries

Manufacturer Part Number RS130
Standard Warranty 2 Year
Manufacturer Website Address www.sennheiser.com
Earpiece Type Binaural
Additional Information Open, circumaural wireless stereo RF headphone system
Intelligent auto-tuning with memory function
Self-learning automatic level control provides optimum signal reception
Power supply: 2.4 V to 3 V via 2 AAA size NiMH batteries (LR 03)
Very lightweight headphones, extremely comfortable to wear
Connector: 3.5 mm stereo jack plug with adaptor to 1/4" (6.3 mm)
Operating time: 22 hours approx.
Receiver:

Modulation: FM stereo
Carrier Frequency: 926.1, 926.8, 927.5 MHz
Transmitter:

Modulation: FM stereo
Carrier Frequency: 926.1, 926.8, 927.5 MHz
Signal To Noise Ratio: > 68 dBA
Broadcast Distance: Up to 100 m (RS 130 - 926 MHz)

Brand Name Sennheiser
Distortion <0.5%
Weight 9.7 oz
Minimum Frequency Response 18Hz
Earpiece Sensitivity 104 dB SPL @ 1kHz
Product Name RS 130 Wireless Headphone
Maximum Frequency Response 21kHz
Product Type Headphone

Green for you OP... nice set of headphones. For anyone that is interested, you find these refurbished online for $50 shipped.

cgott42 said:I have the RS110 and like them very much - other than the dock/charger is there any difference between the 2?
1. rechargeable battery with dock/charger
2. SRS surround mode
3. circumaural (fully encapsulates the ears)

Just an update, offer still good plus use 5% off coupon for $75 after rebate (+ % back for live.com too?)