Smartphones Guide
Sell iPhone 13 Pro Max for Cash in San Diego
Published · Updated · By San Diego BuyBacks Team
Phones depreciate fast — a iPhone 13 Pro Max sitting in a drawer for six months can lose 20–30% of its value. San Diego BuyBacks in National City pays cash today for iPhone 13 Pro Max and all major smartphones, whether they are carrier-locked to AT&T, Verizon, T-Mobile, or fully unlocked. Customers from San Diego sell to us because offers are real, payment is instant, and we do not require paperwork beyond basic ID verification.
What affects your phone's cash offer
Model year, storage size, and carrier lock all matter. A 256GB unlocked device typically earns the strongest offer. Screen condition is the biggest single factor — a flawless display can mean hundreds of dollars more. We also check battery health via iOS settings or Android diagnostics, Face ID / fingerprint sensor function, and verify the phone is not reported lost or stolen through CheckMEND.
Bring these with your phone for the best offer
- • The phone itself, charged enough to power on and display settings
- • Original box and accessories if available (not required, but adds value)
- • Unlocked passcode — we need to verify Find My iPhone / Factory Reset Protection is off
- • For locked phones: a receipt or bill of sale to confirm ownership
Why SDBB beats phone kiosks and trade-in apps
Kiosks like ecoATM pay 30–50% of market value based on a rigid algorithm. Trade-in apps like Swappa charge listing fees, require shipping, and hold funds for days. At San Diego BuyBacks you walk in, get a real offer priced against current resale data, and walk out paid — cash, Zelle, Venmo, Apple Pay, Cash App, or Meta Pay, your choice, same visit.
Sell your iPhone 13 Pro Max near San Diego
We are at 3116 E Plaza Blvd, National City — a short drive from San Diego. Walk in Monday–Saturday 10AM–6PM, or text a photo and the exact model to (619) 918-2526 for an advance quote. Most phone deals close in 10 minutes once you arrive.
