The Short Version#
The iPhone 17 Pro Max is the highest-priced phone on our ladder today. At the time of writing (9 September 2026), TechLoop pays up to £905 for a pristine unit — and the 17 Pro and standard 17 aren't far behind.
But that number has a shelf life. Apple announced the iPhone 18 Pro and Pro Max on Wednesday 9 September 2026, with pre-orders from Saturday 12 September and the phones on sale from Friday 18 September, and every September the same thing tends to happen: buyback prices for last year's flagship soften as the market fills with trade-ins. If you're planning to upgrade, the time to act is right now — sell, or lock a quote now and post it when the new phone arrives. Weighing whether to upgrade at all? See iPhone 18 Pro Max vs iPhone 17 Pro Max.
| Model | Top Price (Pristine) | Good Condition* |
|---|---|---|
| iPhone 17 Pro Max | up to £905 | ~£591–£769 |
| iPhone 17 Pro | up to £741 | ~£561–£629 |
| iPhone 17 | up to £495 | ~£386–£420 |
| iPhone 17e | up to £454 | ~£306–£385 |
*Good = fully working with light everyday wear. Exact quotes depend on storage and condition — check yours in 30 seconds on the device page.
One real data point on how short that shelf life is, from our own ladder: our top iPhone 17 Pro Max quote was £956 on 7 September 2026 and £905 on the morning of 8 September, after our overnight price update and before Apple had said a word. A £51 move in a day, on the phone with the most to lose, with nothing announced yet. That is the case for a locked quote in one sentence.
Why the Pro Max Holds Its Value#
Three reasons the 17 Pro Max sits at the top of our ladder:
- Supply. Pro Max buyers skew towards people who upgrade every year — which means used units are plentiful after a launch, but scarcer before it. Right now, before the new phones go on sale, supply is normal; it usually rises sharply after that. That's your leverage.
- 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.
- Durability. The aluminium unibody and Ceramic Shield 2 glass 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 a 2TB Pro Max is £209 at resale today. 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, battery health above 90%. The headline price.
- Good — works perfectly, light scratches you see when you look for them. Around 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 — roughly £235 at the top storage tier, about what a pristine iPhone 13 fetches.
Battery health has hard lines in our grading: Pristine needs battery health above 90%, Good above 80%; below 80% grades as Poor. Check Settings → Battery → Battery Health before you quote.
Why September Moves the Price#
A keynote does not make your 17 Pro Max worse. It takes the same photos on 10 September as it did on 8 September. What changes is supply. Within days of an announcement, a large number of people commit to upgrading, and their old phones — this year mostly 17 Pro and Pro Max models — reach the resale market together over the following weeks. With plenty of stock to choose from, buyers can be choosier, and prices for the outgoing generation usually soften.
We will not put a percentage on it, because the size of the move varies by model and by year. The direction is the part that has been consistent, and it is the reason a quote locked before the wave is worth having: whatever the market does during those weeks becomes our problem rather than yours.
How to Sell It (Without Getting Burned)#
- 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.
- Check any finance. A phone on a finance agreement can be blocked by the network later if the balance behind it is not paid, so make sure ownership has passed to you and any balance is settled before you sell. We run an IMEI check on every phone on arrival and cannot buy one that is blacklisted or reported.
- 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.
- Post free or drop in. Free tracked Royal Mail label, or same-day payment at our Swindon shop if you're local.
- Get paid the day it's verified. Bank transfer, same working day after inspection.
Getting a sealed iPhone 18 Pro through a carrier upgrade you do not actually need? That is the other way to sell — a sealed, unopened phone grades as Pristine. See selling your iPhone upgrade for cash.
Pro vs Pro Max: Worth Selling Both?#
If you have a 17 Pro, the same logic applies. It is worth up to £741 today, and it sits in the same trade-in wave as the Pro Max: the iPhone 18 Pro is its direct successor, so the same supply effect lands on it in the same weeks.
The Bottom Line#
The iPhone 17 Pro Max is worth up to £905 on our ladder today, the 17 Pro up to £741 — and both numbers are usually at their firmest before a launch, not after it. If an iPhone 18 is in your future, sell now or lock a quote before the trade-in wave lands, and let someone else absorb the September softening.
Check your iPhone 17 Pro Max's exact value →
TechLoop is an independent Swindon business. We are not affiliated with Apple.