I bid and won an item from ebay with a no or 0% feedback seller

I was using my phone to bid on ebay and saw the item almost ended maybe 19sec. So here I'm bidding without checking it out the price is so low it is an Iphone 4 8gb for $165 + $8shipping description says it's new but it's a week old and says his not satisfied with it so his looking to buy a new one that's why he was selling this phone. When I won the item I got so excited! But when I saw that no other bidder besides me I started wondering why. Plus the seller was an ebay member since 2011 and he didn't have any item for sale and the most important to all he has 0% feedback! That just really blow me away. I kind of worried to send my payment so I kept thinking what should I do as I don't want to get a negative feedback either. I'm 100% ebay buyer and I pay for my items very quickly! I received a message from this seller for the item I just won and telling me to let her/him know as long as I send my payment. I didn't respond at all not for long I got another message from the same person asking me when can I send my payment. I have been in ebay for almost 4yrs. As a buyer but I don't have any seller asking me like that, as like what I said I pay for the items I bought very quickly! But this just very suspicious seller and I'm not sure what to do. I had respond to his message and tell him/her how I feel and my concerns. I apologize because it is wrong for not paying the item and to even bid on it. But I don't want to lost my $173 dollars for nothing. I would to love to pay but can't give this money for free. He/she responding to me with excuses and telling me that he will leave me a negative feedback as I refuse to pay the item, but I said that's fine. I can take the negative feedback but not to lost money.

PS. He doesn't have the original item picture his just using the stock photo.

So guys do you think I did the right thing? Just want to let you know I felt bad for the person because what if his real. Any comments are welcome, thank you everyone for reading thi

Sellers are not allowed to leave negative feedback on eBay anymore. He can however report you as a non paying bidder and get a strike against your account. Get another one and you may be severely restricted as to what sellers will sell to you. Get a third one and eBay can kick you off.