I often see requests for used furniture. Of course, if you find it for free there is nothing better; however, if you have to buy some, be sure to check the Schnäppchen markt Bonn ( Protected content ) where you can find VERY interesting offers (in the middle of a heap of trash, so you will have to look for yourself). They also deliver at home for reasonable price. I bought 4 cupboards and a bookshelf there, for about 30€-50€ each, also because the more things stay there, the less expensive they become. We saw there a complete bedroom (double bed, bookshelf, wardrobe, table) for 250€ and sofa+armchairs for 150€, but new offers come and go weekly so you may want to check more than once, if you are unable to find what you are looking for. Got take a look, it is sure worthwhile!