A Skoda Fabia is a functional if unexciting choice - although you might be surprised how quickly you'll grow out of it as a family! It's quite a small car, even as an estate. We rate the Peugeot 308 (and 308 SW) - it'd be a good purchase and practical enough for your needs. Alternatively, a Honda Civic would be a very reliable and practical used car, especially if you can find a 2017 model within budget. We'd also recommend a Skoda Octavia - it's a very practical family car that represents excellent value for money. With regards to mileage, there's no need to be too concerned about high mileage, provided it's got evidence of regular servicing (and, obviously, the price reflects the higher mileage).