The buyer has in fact now opened a dispute with Paypal -- even though I offered a refund immediately upon receiving the phone back. This is a person who had a feedback rating of 2, and I believe that he will end up getting a refund, plus my phone, because I don't expect to see it again. I also think that is why he is going on and on about me -- calling me a "fraudster" on the Paypal dispute postings. He is making far too big a deal about this considering I immediately offered him a refund, even though the condition of the phone he claims to have received is nothing at all like the phone I initially mailed to him. And of course he is also promising to leave me horrible feedback. This is my first experience with something like this -- although I have read about scams like this before on various discussion boards on the internet. I honestly think this person is playing eBay, Paypal, and me, and I have this sinking feeling that I am going to come out the loser here.
Again, I repeat that I would never sell to anyone in Russia again.