Buying used(old) phone: For what we should be aware of?


Friends can you suggest me that if I am buying a used phone from an unknown person, what should I take care of?
I am asking this because sites like OLX and other have so many listing but have no safety featured for fraud activities. So if anyone can guide me it will be helpful.

I am not buying now but I just want to know that how a deal should be made, and how to negotiate:-D.

Things that I know
1. Check for IMEI number of phone and Bill matching.
2. Scratches and check if broken part or so..
3. Check Battery, if original or not.

any other thing i should take care of?
I know it will be foolish question, but I think it's better to ask foolish question here rather than to be fool when I am dealing:|
Top Bottom