Mazuma didn’t offer the highest valuation for my device but they did honour the price they quoted, I had already sent it to another re cycler who offered a good price for my iPhone but as soon as they received it slashed the offer due to a failed battery health check. I had my device returned and sent it to Mazuma instead. One tip I would suggest is to contact Mazuma before you send your device to find out what they call good battery health. I was told for my model and age of the phone anything over 70% Would be good enough and mine had 82% so I knew it would be ok.