Tomtom Tom Tom GO300 GPS Receiver

Entry level tomtom sat nav device, since been replaced by the tomtom one (Which is much the same, only more compact). Easy to use even for the beginner, you can either type in, via the 3.5" touchscreen, the town then road name (even the street number) or the postcode and it will take you straight there. You can store your frequently visited places so you don't have to re-type address each time. Very useful, especially if you have speed camera locations loaded on it (Might pay for itself in saved fines !)
There are many free websites where you can download POI's (Points of Interest) like swimming pools, congestion charge zones or a particular shop brand. (You may need a bigger SD card for large quantities, I recommend a 512Mb)
Beware, thieves love them, mine was stolen, I have the upgraded 510 now but the 300 is just the same when it comes to directions and after all, that's what it's for. Bin your maps and get one !

You'll find a good used 300 on ebay for just over £100, good luck.

PLEASE SEE MY GUIDE ALSO !
Tom Tom, Sat - Nav, Widescreen Models 510, 710 and 910