You mean the Recto Recording Preamp? Combining that with a Triaxis would be pretty pointless-- they're both preamps. I have owned a Triaxis and now own a Rec Pre-- basically, the Rec Pre gives you better tone (not that the Triaxis isn't great, because it is!) at the expense of programmability.
Aside from that, I'd figure on paying USD$900-1000 for a very gently used Rec Pre. A Triaxis will set you back a lot more.