Got an email from a person interested in an
SEO related domain name, from a throwaway @gmail.com account (clue #1).
In our email exchanges to the same address, his named a couple of times (clue #2)
preston rodriguez
charles preston
charlie j preston
When asked why his his name changed, and if he currently owned any domain names, he replied, "My identity not important at this point" (clue #3 - YOU'RE OUT!)
People who play identity games are usually going to pay you with stolen credit cards or phished PayPal accounts, and the seller gets burned. Beware of this guy or anyone else who can't seem to remember their own name.