Would you buy a second-hand device?

[Guest cryptoncore]

Hello everyone, had my Galaxy S3 for about 3 months now and already starting to experience screen burn. Rang up ASDA and asked for info on it and they will refund the full £239 paid. 

 

So I was thinking of purchasing a nexus 5 from WeBuy (AKA Cex) for £270 by adding money to it. Do you think it will be okay to buy second-hand?

 

Anyone got any experiences of buying second-hand handsets as I am seriously considering it.