Tonar Pre Amp vs Cambridge Audio 640p

So I am buying a Rega RP1 soon, and I was wanting to go with the Cambridge Audio Azur 640p to go with it, but the guy I am buying it from is recommending "the Tonar" (didnt give me a model #) for 50 bucks less.

Any thoughts? 50 bucks is nothing to me, and ive been looking up the 640p for a while now, is the "Tonar" any good? Is there more than one perhaps?

I asked him to elaborate on the specific model # of the pre amp in question and am awaiting his response.

I wanted to make sure he had it for when I planned to drive down to pick them up, so I went with my gut feeling (and my first choice) and went with the 640. 

I hate when I do a bit of research and then the guy I am buying from suggests something different.