A free program for Android, by Mechya.

OfferUp is a marketplace that connects people who have items to sell with those who are looking to buy. You will be able to find items for sale in a variety of categories, such as clothing, electronics, furniture, food, and pets. You will also be able to find buyers in the same categories. Once you find an item that you want to buy, you can send a message to the seller to discuss the price and conditions. If you are satisfied with the price and conditions, you can then make a payment and the transaction is completed. If you are not satisfied with the price or conditions, you can simply walk away and you will not be charged.

If you are a seller, you can use OfferUp to sell your items for a much higher price than what you are paying for traditional shopping and selling. You will not need to do any of the work, and you will not need to do any of the shopping.