I sold my wifi 16gb for 375 LAST weekend. It was only 3 weeks old. Ouch.
Yeah, these aren't the iPhone model guys. They take a big hit simply because they were never carrier subsidized up front like the iPhone, and there isn't a market for unlocking (that commands a higher price) like the iPhone.
I think I've decided I'm keeping my 64GB 3G iPad 1...I dont see enough additional value for a net of probably $300 out of pocket (and I'm the guy who waits in line for everything). Thats my philosophy...at least until I hold one at the Apple Store, that is