I was in JJB near me in Bedford yesterday, and they had about half a dozen Reebok mountain bikes with front suspension on display for £65, which looked very good quality if you're just after something to get you around town, to and from the station for work etc.
I assumed it was a store clearance, but they're also on their website:
18" and 20" frame sizes are available, which I'd guess would cover everyone from about 5'5" to around 6' (feel free to correct me!)
* 26" wheel gents bike.
* Steel frame finished in blue with black suspension forks.
* 18 speed thumbshift gears.
* Steel V style brakes.
* Black alloy wheels with black spokes.
* Supplied with Reebok branded colour coded saddle and kickstand.
"Usually delivered in 3 working days for UK mainland destinations.
Allow 2 extra days for more remote areas.
There is a delivery charge of £9.99 with this bike."