Scams do exist, always use caution. You can check local public records for an owner's name, thereafter ask for proof of ownership, or consider working with an agent; don't exchange any money until proof is satisfactory, never mail a deposit, always visit the unit, etc
you can easily search the Tax assessor website to findout the name of teh buyer. You have to be very careful of internet scams, Many listings are being listed by people claiming to be the owners and they are asking for deposites to be wired to them. we just helped the authority to locate one guy on craig's list doing exactly the same. Be sure to do your homework before you start wiring money.