C-J PV11 preamp in pristine condition, bought about 18 months ago. Works perfectly and made a huge improvement in my 2-channel sound (had been using Sherwood-Newcastle P-965 pre-pro for both 2-channel and surround sources). A close second are the two Vandy 2Wq subwoofers I bought here - both from local sellers - that augment my Vandy 1Cs. A huge upgrade from my Def Tech PF15.
What's your greatest purchase...
from this site? Mine was the Ars Filarmonia which will hopefully arrive this week.