What car would you buy with 800 euros free per month?

As a 30 year old living in Central Europe after I pay morgage, food, misc I am left with 800 euros per month. I have some money in the bank for a rainy day and some in investment funds and I don't want to take from them. With the 800 per month I want to save a little but also afford a car. My use case is this: I want a car that will be driven on the motorway at 80mph/130kmph once or twice per month to my hometown costing 18 euros for fuel in each direction if its 5L/100km (45mpg) and very rarely