Also, a lot of apps for buying, selling, and reselling come with features like safe payment processing & shipping choices, which can expedite the selling process andavator give buyers and sellers peace of mind. In general, selling and reselling apps provide a practical means for individuals to make money from the sale of goods they no longer require or utilize. For those seeking to make money on a flexible schedule by performing small jobs or tasks, task and gig applications are a popular choice.