Sent my Samsung Galaxy S10e to them, in very good condition. It has no scratches as it had a screen protector and hard wallet case from day one. I took several photos of the phone before sending.
They offered £55.
The company have just emailed me saying they've 'tested the phone and it's got Screen Burn' and needs a 'new screen' and the offer has been reduced to £10.
Screen burn shows up as colour ghosting and can be easily seen by the naked eye. It's usually caused by hundreds and thousands of hours of stagnate display. I always had a Screen Timeout on all my phones and there absolutely categorically was no screen burn whatsoever on that phone prior to my sending it.
Obviously I've rejected their offer and if my phone isn't returned to me within 10 days in the same condition I'll be contacting Trading Standards.