Match the platform to the device

• Phones, tablets, laptops, current-gen consoles: eBay. The national buyer pool and the search behaviour are unmatched, and the 13.25% fee is the price of a fast sale
• Common, easily described electronics: Mercari at 10% plus $0.30 nets more for the same effort
• Broken, untested, or incomplete: eBay sold as for parts, where buyers specifically search for a donor unit
• Furniture-sized and appliance-sized: a local sale at zero fee, cash on collection
• Vintage audio, cameras, and instruments: eBay, where specialist buyers search by model number

Price the condition, not the model

Look up sold comps for the exact model, then split them by condition. A functioning unit with a battery at 85% health is a different product from one with a swollen battery, and the market prices them accordingly.

Be specific in the title: storage size, model number, carrier or unlocked status, and what is included. Vague electronics listings attract lowball offers and then disputes.

Wipe it before you photograph it

Factory reset and sign out of every account before you take photos. A photo of a home screen is a privacy leak, and an activation-locked device is worth roughly nothing to a buyer.

For anything with a serial number, photograph it clearly. It reassures buyers and it protects you in a dispute over what was shipped.

The fee reality on high-ticket items

At $700, eBay takes about $93 and Mercari about $70. That difference is larger than most people's willingness to negotiate, which is why higher-end devices are worth listing on both and letting the market choose.

Where a local sale is realistic, the zero-fee option usually beats both, provided you meet in a safe public place and accept cash.