This is the First time that I will be rating a negative feed back to my fellow tcper, and I think he dereved it

Let this be a waring to all my fellow tcper.
This fellow lied to me.
He swapped his n70ME and added cash for my n80c
He informed me thru text that his unit is never been opened, a Music Edition fone (ME) and has no problem.
When I swapped my fone, I noticed that the battery meter of his fone is low. He informed me that he does not have the time to charge his unit because he came from school (UP daw).
I tested his unit, camera, flash, bluetooth, all works fine, even the front camera.
When I'm testing to call, his N70 suddenly went blank. He informed me that the battery is drained (I took his word for it, it only have 2 bars left when I tested his unit).
He promised that his unit has no defect. I took his word for it.
Now, after I charged his unit (at home), I noticed that the signal bar is erratic. It took a full minute to send text and when I try to call my number (in the N70ME), it is not ringing. I checked the ringer and it was in full volume.
I had the fone checked by a technician in MCS. He said that the unit is not a Music Edition (ME), but just plain N70.
he informed me that the internal antenna had a repair, and there are several more repairs inside. It would take me a thousand pesos to have the unit repaired.
This was a bad experience for me.
I texted him several times regarding his unit, no reply.
Tried calling him to several times, but it seems he changed/discarded his sim card.
Have sent him a PM thru TCP, no reply yet.
It has been 4 days now, and not a word from this person.
Please be careful in dealing with this fellow.