Coming from someone who was recently scammed by a Nigerian, it sucks.
I recently purchased an Inspiron XPS-2 and wanted to sell of my 9300 on E-bay. Mind you, I'm naive to a lot of the Internet scams out there. A Nigerian man with absolutely no buyer rating contacts me to cancel the auction and offers over $2,000 for my laptop (which I only paid $1,200).
The $$$ must have blinded me, as I cancelled the auction (even though there was a good chance someone was going to buy it). The man said he would use a money order through Western Union's bid pay to pay me. I even got e-mails from the (fake) site.
To make a long story short, I sent the laptop without getting any money. The shipment cost me $500. If the it hadn't been for people on this board and DHL's incompetence, I would've lost my laptop and $$$ to this piece of crap.
I lost over $500 and am now stuck with two laptops...
Lesson, watch out for people selling things on the internet. Make sure they have references or positive feedback.