"Like new, barely worn" read a tutti.ch listing for an Even G2 last week, priced a good forty percent under what the glasses cost new from an authorised reseller. A reader forwarded us the link and asked whether to go for it. The honest answer: maybe — but only after checking a few things the listing photo will never show you.
Short answer: a used Even G2 can be a legitimate, cheaper way into the display-glasses category — but the risks are specific and concrete: a pairing that may still be tied to the previous owner's account, a battery with no known wear history, a possible scratch on the waveguide sitting right in your field of view, prescription lenses ground to someone else's eyes, and usually no manufacturer warranty left. None of that automatically makes buying used a mistake. But every one of these points belongs in the check before you pay, not after.
Why this is different from most other used electronics
With used headphones, a factory reset usually settles the matter. An Even G2 has two quirks that make buying used more complicated than most other second-hand gadgets. First, it is a pairing to an account and a phone, not just hardware: it connects to a smartphone over Bluetooth, with no SIM or eSIM of its own — but through an app the previous owner was signed into. Second, the optics that carry the display into your eye sit inside the lenses themselves, and if the pair was ordered with vision correction, those exact lenses were ground to one very specific, unfamiliar prescription. Neither of those shows up in a listing photo, and neither is something a normal used-electronics check for headphones or a smartwatch would even think to look for.
The pre-purchase checklist
Work through these seven points before paying for a used Even G2 — ideally in person or on a video call with the seller, not after the transfer has gone through.
- Confirm the pairing and account status. Ask whether the device has been unpaired from the previous owner's account and phone. Safest option: test-pair the glasses with your own phone before any money changes hands. We are not aware of an official, documented step-by-step transfer procedure — if in doubt, ask AI-Eyewear or Even directly rather than trusting a verbal assurance.
- Test battery health yourself, don't just take someone's word for it. The battery (192 mAh, roughly two days of typical use out of the box per the Even Support Center, with the case good for around seven additional charges) loses capacity over time like any lithium-ion battery. We don't have a solid figure for how much realistically remains after one or two years — so test the actual runtime over a full charge cycle rather than trusting an estimate.
- Check the waveguide in bright light. Tilt the lenses at an angle against a bright light source and look at the inner surface for fine scratches or haze. A damaged waveguide usually shows up as a bright spot or streak sitting right in your field of view once the display is switched on.
- Inspect the frame, nose pads and temples. Look for bends, loose hinges, or visible signs of past repairs. Because the frame's fit affects where the image sits in your field of view, get a professional check if you're unsure, rather than bending anything yourself.
- Settle the prescription-lens question separately. If the pair was ordered with vision correction, the lenses are ground to the previous owner's prescription, not yours. Assume you will need new prescription lenses, and factor that cost in from the start.
- Ask directly about warranty and support status. We are not aware of an official programme that automatically transfers a manufacturer warranty on private resale. Ask for the purchase date and proof of purchase, and if in doubt, ask AI-Eyewear directly what support is realistically available for a device bought second-hand.
- Ask for accessories and proof of purchase. A charging case, cable, and where possible the original receipt are what a serious listing should include. Their absence isn't automatically disqualifying, but it is a reason to ask more precisely where the device came from.
Prescription lenses: the point buyers overlook most easily
With an ordinary pair of second-hand sunglasses, prescription rarely matters — you wear them uncorrected, or an optician swaps the lenses, and that's the end of it. The Even G2 adds an extra layer: if the previous owner ordered the glasses with individual prescription lenses, those exact lenses are the ones fitted into the frame — ground to their dioptre values, not yours. There are two frame variants (G2 A with a wider bridge of roughly 22.6 mm, G2 B with a narrower bridge of roughly 19.5 mm) plus adjustable nose pads and temple width — but that governs how the frame sits, not the strength of the lenses. A used pair carrying someone else's correction can, at best, look blurry to you, and at worst bring on real discomfort or headaches. The honest advice: if vision correction is involved, assume a used purchase means fitting new prescription lenses, and read our page on prescription lenses for the Even G2 first, so you can weigh that extra cost realistically against the listing price.
What's actually for buying used — and what's against it
Buying used has a genuine upside: price. If you mainly want to try the Even G2 for notifications, teleprompter or translation without risking the full new price, a used pair gets you in cheaper — provided pairing, battery and waveguide really check out. Against it, honestly, is quite a bit: you skip the professional fitting that normally comes with a new purchase through a reseller, you don't know the battery's real ageing history first-hand, you usually have no manufacturer warranty left, and if vision correction is involved, the cost of new prescription lenses is often added on top of the used price — which makes the apparent saving smaller than the listing suggests. We say this not to talk you out of buying used, but so you can do the real math before you commit.
So: buy, skip, or test first?
Buy with confidence if the seller allows a pairing test in person or by video call, the price already accounts for the unknown battery condition and possible new prescription lenses, and you accept that a manufacturer warranty is usually gone.
Think twice if you need a working warranty from day one, cannot test the pairing before paying, or the only affordable option comes with someone else's unverified prescription that you don't intend to replace.
Test before you commit either way: ask AI-Eyewear directly what support is realistically available for a second-hand device, compare the used price against the options at Even G2 kaufen, and read why AI-Eyewear for how we think about support and fitting after a purchase.
Disclosure: AI-Eyewear is the authorised Swiss reseller of Even Realities. We have not invented a warranty or return promise for used devices where none exists — get binding information directly from us.