In an attempt to answer my own question, I've been perusing ebay and other sites trying to find these speakers to see the going rates. It looks like the front left and right speakers sell for around 800 a pair nowadays, and the center for 100 or 150. The surrounds are going for 350 a pair on ebay. So yeah, I guess I got a good deal.
That SW15 sub is a freakin' beast. I can't find any current prices for the thing, but it weighs 85 pounds and has two 15 inch drivers. I'm interested to see how this one does in my theater room.