Wow, no interest at all?? 
You're not alone... lots of "viewing" here in general, but not much transacting going on. Hang in there. I continue to post items here despite the low Post to sale ratio.
I Just thought I'd mention that the X-10d Paired with a passive attenuator ( aka Passive preamp) works well. Quite a few "high end" preamps have a tube buffer stage. Currently SCHIIT offers a tube buffer stage in it's new preamps.
The Passive preamp / X-10d paring works out well. I've also used one with my Airport express when streaming from IOS / OS10X devices. there's also the option of running the X-10d through a monitor loop so you can activate and deactivate it using the "monitor" feature on a preamp, receiver or processor.
It can be used with a variety of source devices aside from CD players or used creatively to enhance the sound of a system in other ways ( some mentioned above). There's far less audio marketing voo-dioo in something like tube buffers in general compared to some of the audio "tweaks" out there.
- I ended up "collecting" the entire X-Ponent series of components ( some pieces are harder to find than others), I started with just an X-10d and still use one with a McIntosh Cd player.
Good luck with the sale.
