Best in car sat nav, £100 or less

Richard_T_

Im after a new sat nav for my car, and im on a budget of £100 or less.
Im aware of the apps for smartphones, but im after a stand alone unit.

Also im afet one that costs very little to update the mapping ( or even comes with free map updates)

any recomendations thanks??

retired2011

My wife and a road atlas.