I've got a Lava camera with full accesories for sale.
Got it for a snowboarding trip but didn't really use it so its virtually new.
comes with a nice suction mount for windscreen mounting and a car adapter. it will also record in chunks for permanent install.
Comes with a 4 Gb card.
All boxed as new.
As here:
http://www.snowandsun.co.uk/shop/hd-helmet-cam/

£45 posted.

Tempted

Whats the battery life like?

Haven't used it enough to comment other than the manufacturers guides
It has a cigarette adapter for car use though.

Its not a go pro but nice and cheap to get some track day action down.