I'm not the seller, but we should have one or two people in this community with one. IMO it's the second best rackmount preamp I've ever played next to the Triaxis. I used to own one and regretted selling it for years. The seller has a fair starting price too. One was on the bay last week for $350 and was snatched up in hours.
Rocktron Piranha Tube Preamp - eBay (item 280640657141 end time Mar-14-11 00:30:46 PDT)
I know this is going to make me sound like a dumbass, but what does a preamp do? Does it give you like a "Amp" Distrotion? or something else?