Small double mattress (Kincorth AB12)

Hi i'm just moving into my new flat within aberdeen, im only 17 so currently cant afford a mattress for the price that they are now a days. If anyone has any spare or ones they no longer need that would be appreciated. I can pick up however would need to know location. I'm based in Kincorth so preferably up to at least a 30-1hr bus ride from there