Summarize the following:
prior to selling it. Take advantage of a cell phone repair kit to add some value to your device prior to selling it on an online marketplace. These kits provide you with the tools needed to repair your phone, although the quality of instructions varies. If you can conduct a successful repair, you can bump the price up and list the phone as repaired.  Focus on fixing cracked screens, broken headphone jacks, and loose buttons. Repair kits can be purchased from most home hardware and big-box stores. Websites like eBay, Amazon, Swappa, Craigslist, and Kijiji and great for selling old phones for whatever price you want. Always provide pictures, as well as relevant information such as the Electronic Serial Number (ESN) or International Mobile Equipment Indicator (IMEI) number, service compatibility, storage capacity, and whether the phone is locked or unlocked. ESN and IMEI numbers are typically found on a sticker located underneath the battery, on the outside of your phone's box, or in your phone's "Settings" or "Options" menu. Call or visit local electronics or cell phone repair stores to see what phones they accept for purchase. Payouts range from just a few dollars to well over $100 depending on the model, but you won't be able to bargain like you can when using online marketplaces. Always visit independent shops when selling your phone. Large companies like BestBuy most often pay the least for used phones.

Summary:
Repair your device Sell your old phone through an online marketplace to set your own price. Trade your device in to a cell phone shop if it's new or in good condition.