You can earn significant money with nettauksjoner. A good start is to sell off all that you do not need, it only takes up space anyway. It is a great way to learn the systems on the auction, and to gain experience on how buyers react to different products. Then you can make their own products and add them for sale, or import other's products for resale.
If you want to clear some space out in your house and have a big stack of books you’ve been holding onto for too long, you can make money selling your books and textbooks online. Stores like Half Priced Books and others will give you cents on the dollar for each of your current books while you can check what your book is worth by simply entering the ISBN number on Book Scouter.
How much will you make? I think my best month with Google AdSense was almost $5,000 over the last ten years. That amazing month blew my mind since it was actually near the beginning of my blogging journey. When you go from making zero to $5,000 in a month, that will rock your world. For me, it also got me even more excited because I knew there were other ways to monetize.