Books and other stuffs for sale for charity

One of my near relative is very sick. He is suffering from chronic DVT for couple of years, he had a surgery on last August but now having serious infection on his skin. He is out of hospital now. It will take several weeks to fix his skin damage before another surgery in his vein. I helped him before. But want to help more. His wife is jobless now. They have one 7year old kid. I have many books which I and our family finished reading and also lot of unused stuff I bought or received as gift. Which I want to sell for little price and want to donate this money to my relative.