Does anyone have experience of buying refurbished phones from Argos/ CurrysCPWPCWorld/ or Tesco Ebay stores? They all seem to offer 1 year warranty. Are there any differences to be aware of, or things to avoid with this? Have been waiting for s7 to drop in price but not happening and I need a phone sooner rather than later. Any good alternatives? Reluctant to source from foreign supplier as would prefer to have UK warranty to call on if need be.