Two single ikea mattresses available, used but in decent condition. They are to fit a European single, so longer than a normal single (90 x 200cm). They are foam mattresses with washable covers. Even if you didn’t want to use them as mattresses I’m sure the foam could be put to good use!
This is what they are on the ikea website: https://www.ikea.com/gb/en/p/afjaell-foam-mattress-medium-firm-white-80568649/