Нашёл 10 млн ответов for 'Cell Phone for sale'.
https://www.amazon.com/cheap-cell-phones-sale/s?k=cheap+cell+phones+for+sale
https://www.amazon.com/Unlocked-Cell-Phones-Used/s?rh=n%3A2407749011%2Cp_n_condition-type%3A6503242011
https://www.amazon.com/Best-Sellers-Unlocked-Cell-Phones/zgbs/wireless/2407749011
https://offerup.com/explore/k/cell-phones/
https://offerup.com/explore/sck/tx/houston/cell-phones/
https://offerup.com/explore/sck/ca/modesto/cell-phones/
https://www.walmart.com/cp/cell-phones/1105910
https://www.walmart.com/browse/cell-phones/all-cell-phones/1105910_2538833
https://www.walmart.com/m/deals/christmas-gifts__electronics__cellphones
https://www.alibaba.com/showroom/for-sale-cell-phone.html