I found a pale milky pink colour that looked pretty, it didn't state the colour but said it had never been used and the picture showed it in plastic packaging. A mini bidding war later and £8.50 from my paypal account left me the proud owner of an O.P.I polish..
A few days later, a package arrived and there was an unwrapped bottle of 'o.p.i polish' with faded writing on the bottle. I also noticed that the writing was really cheaply printed and chipped off easily, also the 'peelable' label on the bottom of the bottle didn't peel off it was just a single sticker.
I decided to have a little search for the colour on the label 'that's berry daring' and to my suprise pictures of a dark hot pink varnish started popping up and this confirmed my suspicion. I had just paid almost ten pound for a completely fake bottle of nail varnish, whatever's inside smells strongly of chemicals and barely shows up.
Just a warning, be careful of what you buy and don't always presume that everyone is as honest as you are!