Thanks a ton for the concern, gents.
8/8 was actually the last time I heard from the seller. Although he didn't say so, maybe he honestly is away trying to get geared up to go back to school. The address where the money order was sent is practically on Penn State Campus. He stated a few times in the half dozen emails we exchanged that he shipped on 7/31 via Priority Mail, and that the package was insured. I found it odd that he could provide no tracking number of any kind. Heck, ANY kind of proof would be a start. If the rifles are insured, he should have the receipts. I've been given the run around longer than this over the past few years on rifle purchases through the EE, and have not lost hope yet.
For the record, the buyer of the Colt in this thread and I have been in constant email communication over the past couple of days. I had not even seen this Colt for sale thread when, out of the blue, the buyer contacted me asking if I had received the Bushmaster yet. He sent payment to the same address, and has not heard anything from the seller since 8/8 either.
We'll all ratchet up the pressure before long. Like I said, I have been down this road before with slow sellers, and don't want to smear the guy's name yet.
Thanks again for the interest in resolving this matter. I'll keep you all posted.
EDIT: Just received a subscription email showing that Aimless had posted to the Bushmaster For Sale thread (linked in my above post). In a gleeful jaunt over to the thread (where I paid for a rifle that I have not received) to see what site staff had to say about the matter, I find the entire thread deleted. I'm confused now. Was it moved to another location?