It'll probably do the job it was designed to do ok but not sure what age the latest maps will be......possibly 2005 or 2006....does the seller mention that...ask him/her.
Better to stick to a well known Sat Nav like Tom Tom which keeps its maps up to date as well as providing brilliant software to guide you on your way. I have tried 3 different names of Satnav including a one made by Evesham and market under the AA banner. If you are continually sent off in the wrong direction with the price of fuel the cost of the sat nav will pail into insignificance.