Myguide MG3218WE sat nav £30 instore in ASDA. Was one left in the glass Cabinet near Cig counter in Brynmawr (South Wales).
372mhz processor, 64mb RAM.
2gb SD card with western europe maps (2gb limit).
Sirfstar III GPS technology.
320x240 pixel 3.5" antiglare screen (doesn't go as bright as I'd like).
Internal lithium-polymer battery (claimed up to 3 hours operation).
Cig lighter charger and windscreen mount included.
Hit the model number in on the internet and found Ebuyer reviews which suggest it can be hacked to stick tomtom, igo8 or whatever on. The turbodog 5 stuff on it is a load of junk so going to try fiddling with it. Bought this to replace my usual HP Ipaq 2210 + bluetooth GPS combo with Tomtom installed on it. First impressions are that the screen isn't brilliant and the speaker isn't as loud as I'd hoped from a dedicated sat nav unit, but still a little louder than the Ipaq.