Here is the eBay link http://www.ebay.co.uk/itm/Mesa-Boogie-Maverick-2x12-Guitar-Amplifier/253340201797
Recently serviced. It's a loud 35 watts! Currently located around East Finchley (London), but could possibly be in South Birmingham/Worcestershire M42 area.
From the Mesa Boogie website:
Handcrafted in Petaluma, California
35 Watts, Pure Class A Power / 4xEL84, 6x12AX7, 1x5AR4
2 Channels (Rhythm & Lead)
Bright/Fat Switch (Rhythm Channel)
Independent Gain, Bass, Mid, Treble, Reverb and Master Controls per Channel
Output Level Control (over all channels)
Rectifier Select Switch (Tube/Silicon Diodes)
Spring Reverb
Parallel FX Loop w/Mix Level Controls
Slave Out w/Level Control
1 Button Footswitch (Channel Select)
Includes a custom made D2F padded cover from USA (worth £55-60..depending on current exchange rate!), and the original Mesa footswitch.
http://www.mesaboogie.com/support/out-of-production/maverick.html