Sell iPhone 17 Pro Max: What It's Worth in the UK (2026)

The Short Version

The iPhone 17 Pro Max is currently the most valuable phone you can sell in the UK. As of July 2026, TechLoop pays up to £956 for a pristine unit — and the 17 Pro and standard 17 aren't far behind.

But that number has a shelf life. Apple launches the iPhone 18 in September, and every September the same thing happens: buyback prices for last year's flagship drop hard as the market floods with trade-ins. If you're planning to upgrade, the most profitable window to sell is right now through late August.

*Good = fully working with light everyday wear. Exact quotes depend on storage and condition — check yours in 30 seconds on the device page.

Why the Pro Max Holds Value Better Than Any Other iPhone

Three reasons the 17 Pro Max commands the top of the used market:

1. Supply. Pro Max buyers skew towards people who upgrade every year — which means used units are plentiful after a launch, but scarce before it. Right now, supply is at its annual low. That's your leverage.
2. Demand. The Pro Max is the model people actually want second-hand. A one-year-old flagship at 60% of retail is the sweet spot for used buyers, so refurbishers pay aggressively for stock.
3. Durability. The titanium chassis and improved Ceramic Shield mean more units survive the year in "good" or better condition — but it also means buyers expect condition to be good, and grade strictly.

What Actually Affects Your Quote

Storage tier matters more than you think. The gap between a 256GB and 1TB Pro Max can be £100+ at resale. Check your storage in Settings → General → About before quoting — misquoting it is the most common reason offers get revised.

Condition grading is about function first, cosmetics second:

• Pristine — looks unused, flawless screen and body, 100% battery health territory. The headline price.
• Good — works perfectly, light scratches you see when you look for them. Expect 80–85% of pristine.
• Fair — noticeable wear, deeper marks, maybe a worn battery. Around 70%.
• Poor / not working — cracked screen, faulty Face ID, heavy damage. Still worth real money on a 17 Pro Max — often more than a pristine three-year-old phone.

Battery health below ~85% typically knocks a device from Pristine to Good on its own. Check Settings → Battery → Battery Health before you quote.

The September Cliff, With Numbers

We track daily buyback prices across the UK market. Here's the pattern from the last two launches:

On a £956 phone, waiting from August to October historically costs £150–£230. No other decision you make in this process — not which service, not which condition grade — moves the needle that much.

How to Sell It (Without Getting Burned)

1. Get an instant quote — select storage and condition honestly. TechLoop quotes lock for 21 days, so you can grab today's price and ship when ready.
2. Settle any finance. A phone with outstanding carrier finance can be remotely blacklisted after sale — every reputable buyer checks the IMEI, and TechLoop checks it on arrival.
3. Back up, then wipe. Factory reset and remove iCloud/Find My — a device that arrives iCloud-locked can't be paid out until it's released.
4. Post free or drop in. Free tracked Royal Mail label, or same-day payment at our Swindon shop if you're local.
5. Get paid the day it's verified. Bank transfer, same day.

Pro vs Pro Max: Worth Selling Both?

If you have a 17 Pro, the same logic applies with one nuance: the Pro's price gap to the Pro Max widens after a new launch, because refurb buyers concentrate demand on the biggest model. The Pro is worth up to £751 today; its post-launch drop is historically a few points steeper than the Pro Max's.

The Bottom Line

The iPhone 17 Pro Max is worth up to £956 in the UK today, the 17 Pro up to £751 — and both numbers peak now, not later. If an iPhone 18 is in your future, sell in the July–August window, bank the difference, and let someone else absorb the September depreciation.

Check your iPhone 17 Pro Max's exact value →