The Toyota Prius is a very reliable car. Your biggest challenge, particularly at this budget, will be finding one that hasn't had a hard life as a taxi. If you can find one that hasn't covered an excessive amount of miles and comes with evidence of regular maintenance, it could be a good purchase. Receipts for servicing at a Toyota dealership will be a bonus – they carry out a hybrid health check which should give you an insight into the status of the batteries.