HK AVR7000 (their flagship model a few years back w/ DD, DTS, Logic7 & more) on ebay Direct from Harman kardon(refurbed but w/full 2 -year warranty).
Most recent auction ended at $391.00
granted you are taking a chance as these receivers seem to have lots of bugs, but when they are working they sound awesome, and at least you won't have topay for any repairs the first 2 years.
BTW, as far as sonics go, virtually identical to newest flagships AVR7200 and AVR8000
I looked at the 7200 for that price but I got the 630 for $689 shipped. Shipping isn't cheap for the 7200! Plus I figured that the 7200 is old so that's why it's so cheap. The 630 isn't very old and I would like to get that upgrade (when it comes out). It's not just a DPL IIx upgrade either. And the 630 looks better!