I bought this amp in May 2014 as an SE84CKCS, which was subsequently upgraded with the UFO transformers and the Beeswax bypass mod. It also has balanced transformer inputs and the stepped attenuator upgrade, with black figured base and gold volume knob. You can buy this exact configuration today from Decware for a price of $2304 before tax and shipping.
The presence of the balanced transformers will make this significantly more expensive but I'll start at $1500 for offers. I have a ton of input tubes I can include, but the driver tubes and rectifier are stock standard. It was a wonderful amplifier for me for a long time.
I also have some Triode Wire Labs Spirit XLR interconnects (1st gen) that I'll include for $100 (originally $500) if you'd like them with the amp, and a Schiit Gungnir Multibit DAC (no USB) for $500. PM for interest on all items or if you'd like to bundle everything for $2000. Seems like a good deal to me but the market will dictate.

Chicago area pick-up is preferred but will ship within US.