[jandrese]

Even something as simple as:

Have you physically met and personally know the person you are sending money to? Are they a family member?

If you answered no to both of these questions STOP NOW IT IS PROBABLY A SCAM. If you wish to continue please consult with the teller.

[badminton1]

Under that criteria, 100% of eBay transactions would be scams.

[jandrese]

If you are buying a laptop off of eBay from Nigeria and they demand that you use Western Union to pay for it there is very close to a 100% chance that you are being scammed.