This has nothing to do with the internet. I have never seen such fraudias anywhere. If what you are selling has a fault you are bound to tell it to the buyer especially when your stuff is repaired and you got it repaired yourself.
This guy aqgmbest or whatever his nick is a fraudia and should be banned. Also his complete IP range should be banned so that he does not joins this site in future.
@aqgmbest
Tumhe fraud kartay hoay sharam nahi aye? Atleast apnay nam ki he qadar kar lene the. Are you a muslim or not? Even our Prophet (PBUH) has said that while selling, you should tell all flaws to the buyer and not resort to cheating