Where to buy a secondhand car

Hi all,

I’m looking to buy a secondhand car as a runaround. As cheap as chips please (in fact, I probably can’t afford chips). We’re looking on Milanuncios, Wallapop, the usual and fairly obvious places but would very much appreciate local knowledge. We’re in Chipiona but are happy to travel. Something around the Ford Fiesta/Ka size although any make is fine. Price? Cake and eat it (also struggle to buy cake). Any ideas will be very gratefully received. Thanks.