GRANKULLA/ MASSUM from Ikea $128. Not quite an entire sofa and extraordinarily affordable, this product solves your problem of needing extra seating and a guest bed all in one.
Sofa Bed from BoConcept $949 Also a sneaky sofa bed option. Great-looking modern couch during the day, and at night the back folds down to create a nice guest bed.
Ottoman with sleeping function from BoConcept $569 While pricey, this is perhaps BoConcept's secret weapon in the battle for small space options. Incredibly, a small cot fits inside the ottoman that with a cover can also be used as extra seating or a coffee table. The choice of the frame cover fabric can affect the price.
IKEA PS HÅVET from Ikea $499 So, this one's pretty obviously a sofa bed, but it is affordable, and does complete the mission of providing a guest bed for all of your holiday visitors.
What's your favorite hidden sofa bed/guest sleeping solution? Let us know!