Bike Sold

It's abit too unbelieving as the total time to sell the bike is less than 30 minutes.  Yesterday, the buyer came to my side to view the bike.  What amaze me is that he didn't even test the bike, just see the bike information and check there's nothing wrong with the appearance with the bike then pass me the deposit.  The whole meeting did not last for more than 10 minutes.  Though I want the transaction to be fast but this is abit too fast to believe.  This morning I proceed to the bike shop as the buyer wants the administrative part to be settled by them.  Again, I reached there for less than 15 minutes and the deal is done.  I pass them my 11B and signed 3 papers.  Now, I admit that I should have seen what is written in the papers before signing it.  I just called them up and ask what did I sign and the lady told me that it's the receipt voucher, application for transfer pin and transfering of ownership.  They are going to pass me back my 11B in a few days time.  Hope that they won't use it to do anything bad to me.  This kind of thing is scary.