I've had 3 Ford Focus' and they have all been superb. Reliable, low maintenance. If it's from a main dealer, you will get at least 12 months warranty, and haggle over the price. You will knock them down! They will probably pretend to have 'ask the manager' about the price, but fight your corner!
Mileage not that bad, average 10000 / 12000 a year as a norm, car seems to be serviced well, if your intention is to buy, do not use their finance or their so called warrantee, it's not worth the paper it's written on.