After purchasing a laptop:
I purchased a laptop from a fraudulent ebayer, and lost all of my money.
The best way to purchase a laptop or anything of high value is to ensure that they have two purchase options. Firstly that they provide cash on delivery, or Paypal.
Paypal offers complete a recovery of your funds to make sure that the buyer is in control of their money and if something happens they have the opportunity to recover the funds if needed.
Rather than needing to wait for ebay to contact you (which never happens with a dispute) you will automatically retrieve the money given through paypal as soon as a claim is made, or a dispute. By using a trusted source you can purchase items confidently.