Paid 800 for a refurbished iphone in "great" condition. I assumed it had an Apple screen. After I got it, it said "screen not recognized". When I looked in their fine print elsewhere on the site they said they use devices with the high quality third party screens. When the screen shattered a week later from an gentle in-case drop, they said it wasn't covered, and upon getting the screen replaced, the tech pointed out that the after market screen was a cheap, brittle one that said 'HARD' on it's back label.

When I saw a week later that the phone had another issue, I contacted them and they said the warranty was void because I had replaced the screen at another provider (there is no mobile klinik in my area).

It's a real racket, I've had great experiences with Gazelle and companies that share that you're buying a phone with a replaced third party screen.