I agree with Abecollins above and won't repeat what he already said quite well. Prices don't normally drop to seemingly irrational levels for no reason. I'd also agree with Audiotomb above that you should try the EVS Millennium II DAC, which can be had for $1050(probably not much more than you'd pay for one of the older DACs anyway) and you can return it in 30 days if it doesn't transform your system, although I don't know of anyone who has returned one. Another positive aspect of this DAC is that it will be upgradeable to handle the new SACD/DVD-A formats in 2-channel format only, but older DACs obviously will not be able to offer this capability at all. Hey, with the EVS you've got nothing to lose(except maybe about $20 shipping) and everything to gain(see reviews on audioreview.com and stereotimes.com). Best of luck.
Tim
Tim