It is a scam - do not under any circumstances deal with this person

A buyer wants me to sell an item before my bid is up and has told me they already sent me the payment and to ship immediately. i googled the address which does not seem to exist and searching for both the receiver of the package and the person buying and both do not seem to exist. The buyer has a Russian webmail account and is stated to live in Amercia on Ebay with no items for sale and their profile was created the day they contacted me. My items does not have any bids or views on ebay and they are not emailing me on ebay and want to only contat them via my personal email. They told me to ship and send them the shipping verification and i received emails from paypalservice but the email accounts do not look like my regular emails from paypal. the emails are addressed from paypal696@yahoo.com and not the normal paypal@.e.paypal.com email account that sendsemails out. The emails look very similar to nigerian emails i googled and sound like the same situation. I can not see the payments in my paypal and ebay and paypal do not relfect the payments or waiting for shipping verification in order to receive my payment. i have another item for sale and it shows bids and the person intersted in buying and their history and everything seems right with that one but not this item.