What should I do now?

First I want to say that I talked to Jennifer about this first and she suggested that I bring it to the forum for input.
On March 28, Dragonscavern had said she wanted some rainbow pieces and I PM’d her and told her I had a rainbow young and a mother. She said she wanted them both, what else did I have, and I said I had a female ki-rin, that they all were mint, and I also had an emerald lap that had a chip in it that I could sell her for a very good price. She was very excited about the agreement, but was concerned about how much the s/i was going to because the last time she bought 4 pieces, it cost her over $100. I told her I thought I could ship it for much less and I would let her know. So I combined the pieces into 2 boxes very well and safely packaged, took them over to FedEx which is across town, unloaded them, and got the s/i information.
Now, it was Friday night, raining, I was hungry, expecting company, and she had firmly agreed to buy these dragons and was very excited about getting them, “could hardly WAIT!” So rather than take them back to my office where my computer is and unload them in the rain and email the s/i information and wait for her to paypal the money, then load them back up and go back to FedEx and ship them, I just sent them while I was there. Then I went back to the office and emailed her the s/i information WITHOUT telling her I had already sent the boxes. She had sent me her address and phone # “in case the shipper needed it” She was SO happy about the s/i cost of $25.02 and the total cost of $489.84, “Oooh, you are such a Sweetie” she was going to “get some stuff for dinner” and when she got back she would paypal me the money, I would get it that night, no later than tomorrow morning. That would have been March 29. I never heard from her again.
I have left 5 PM’s, she has not pick up any of them. She posted the same gold curl she posted here on the forum on ebay so I posted the “ask the seller a question” twice, no response. I posted a request for help in locating her here and got an email for her, emailed her, no response. I telephoned her using the phone # she left me for the shipper, it was a telephone mailbox, left a message, no response. I asked Jennifer for help, she left a PM for her, no response. I checked with FedEx’s tracking # and they confirmed that they had delivered the boxes to her front porch on April 1 at 1PM.
Then on April 11, I got a PM from her, saying she had never gotten the boxes, that FedEx never knocked on the door or left a tag, that they must have been stolen off her porch, she didn’t know anything about the dragons. I wrote back and said that FedEx confirmed that they had been delivered to the porch at 1Pm and a tag been left, and to please contact me. No response. More PM’s. No response. So on April 18, I sent her a registered letter going over the history of our transactions and her lack of interest in communicating with me and my concluding that I was going to have to move on. On Tuesday, April 22, I got a PM from her. The first part was a ramble about some friend having a problem with FedEx, then ” And what’s the certified letter thing? and you lying in that letter saying that you’ve NOT heard from me and you’ve ALSO called me, I NEVER gave you my phone number, so how could you have called me? Are you NOW stalking me now? I DON”T BELIEVE THIS” … I am GOING to type you this EXACT same letter regarding this…NOTARIZE IT, seand it CERTIFIED MAIL back to you…This way it is a LEGAL binding document… and then you can give it to FedEx and tell them to stick it…All I ASK is that you put the blame where it belongs and it is not AT me” (!!!) So even though I don’t like being called a liar and a stalker, I wrote back a calm PM and I once again said that FedEx had confirm that they had left the boxes on her porch at 1PM on April 1 and had left a tag on her door, that she had indeed given me her phone # when she had given me her address for the shipper, and that I had received only 2 communications including this one in 3 weeks and if she wanted to contact me, please PM me thought the forum. So far, no response.
I understand that I should not have sent the dragons until they were paid for, and I take full responsibility for that. I also know that I had a full agreement to buy the dragons and she never indicated at any time that she did not want them or had changed her mind. The most frustrating thing is the total lack of communication on her part and refusal to acknowledge any responsibility for any part in this.
So what do I do now?