Krell DUO 300 XD SE Upgraded x2

This is a unique opportunity to obtain a much sought after Krell 300 w pc amp that was recently upgraded twice.   First by Krell to bring the 300 to XD standard which means "Krell’s XD (Xtended Dynamics, Dimensionality & Detail) upgrade for the iBias amplifiers takes an already great sounding amplifier and raises its performance to the next level. XD is a classic example of Krell’s continuous R&D efforts reaping benefits across multiple product lines. During the development of the K-300i Integrated Amplifier we discovered substantial sonic improvements by lowering the output impedance below traditional norms. When applying this technique to our existing line of amplifiers, the improvement was so substantial, it deserved its own, unique designation—XD."  
and then we upgraded this unit again to eliminate EMI & RFI contamination yielding wider dynamic range, black background and pure music signal throughput gain in this particular amp.  This is the only amp we are aware of that has been so completely upgraded and now beats its non-upgraded brothers convincingly. Its now a powerhouse of clean musical power. Its a Krell after all.   
 Heres some reviews of the XD Models including this one before our second upgrade, https://forum.audiogon.com/discussions/krell-xd-gear-in-the-house-initial-impressions https://www.stereophile.com/content/krell-illusion-ii-preamp-and-duo-300-xd-amplifier-vpi-hw-40-turntable-audio-technica-art

Costs for these upgrades over the initial unit amounted to $3K. The initial unit market price I paid before the XD upgrade was $3750, if I can gather back half the costs of the two upgrades it's a deal. Buy brand new right now, and it will not sound as good as this unit, and will cost you $10500 or more. The unit currently sits in Henderson, Nevada USA and will ship anywhere from there at buyer's cost along with PayPal fees.