I have a perfect condition DNA-500, highly regarded as one of the best 2 channel amps around. 500 watts at 8 ohm and 900 at 4. This was bought a few months ago from a dealer who only used it very rarely for demos, it has very low hours on it.
I am asking $3,900 (OBO) plus shipping and paypal fees.
I also have a 3 month old Synergistic Research Tesla T3 20A 5' Power Cord for $500.