So, everything is resolved, now. I was refunded the $450!!!
Now, I'd like to share my story and the thoughts that were running through my mind for the last few days:
I was approached by user qspeedss, because I had put out a WTB for a Pico. I immediately took him up on the offer, because it was a good deal, and his feedback was good. After I purchased the item, communication was cut off. I became suspicious very quickly, so I sent some PMs, and started this thread. I was then chastised (rightfully, it initially seemed) by some established members. I sent some PMs explaining myself. Then, I decided to read every post by member qspeedss. I became suspicious of member AGC, and figured out immediately that he was qspeedss (or whoever hacked his account), because of the awkward correspondence between the two users in a thread on the Shure 530. I then did a search on all Picos sold, and found the picture that qspeedss had sent me, which was taken by someone else. I then contacted that member, and asked him if the Pico was sold to qspeedss, to which he replied "negative." I was then 100% sure I had been scammed. I opened a paypal dispute, which would likely have been an unfruitful effort had it not been rendered moot earlier today. I just got home from the bank (wanted to open a fraud claim) and checked my email. Q (name left out) had refunded me the money, and told me that his accounts had been hacked. This is a dreadful situation for all involved, but it looks as though it has been resolved.
Final note. I would not recommend starting a thread like this until you are VERY sure that you have been scammed. The correct course of action is to contact Jude (which I did, too) and paypal. I would like to say that I harbor no bad feelings toward anyone who criticized me for starting this thread, because in most instances I would have been wrong. This has not affected my opinion of Head-Fi, because it looks as though the fraud was not committed by a rogue member, but by a hacker. I should have trusted my instincts initially and not made the purchase, because I am usually right about these things, unfortunately. I hope we can all learn another lesson from this, and get along happily. Of course, this is aided by the fact that my money was returned!
Thanks, and happy posting.
And sorry about your wallets!