Buying car keys online? Tips to help minimize your risk Leave a Comment / San Tan Valley Locksmith / By Admin Guidelines you should follow when buying car keys online. Amazon has many trusted sellers. Try shopping here first. Make sure they have an above average star rating. Input the exact year, make, and model when searching for keys. Cross reference the part they have with another seller. Make sure the pictures match your current key. Check the return policy. Factory refurbished keys usually work pretty well. These are some tips to help with buying replacement keys online.