Online market to make life easier without breaking the Bank

I have purchased various items over the years. I have only good experiences. This includes returns. Purchased some cooling gym towels which I love. Had to make another purchase for family members. Couch covers to protect couches from cats really a good purchase and I wash it 2x a week still looks new.I have a coffee grinder that I use everyday 5 years old. Various other items that makes life easier.