I can't praise this phono pre highly enough. I don't know what you're paying, because at some point you could probably do as well getting something else.
Including the separate power supply, they were $4400 back in 1995, which is at least $6500 today. I think $3000 would be a great price for one w/ the power supply. They did make the later ones with RCA connectors instead of those pesky Camac connectors. And make sure whether you're getting/wanting a hi-gain or lo-gain unit, because they cannot be interchanged.
Even at $4000, you'd be hard pressed finding a contemporary unit with the gain, quietness, and flexibility of the 25s. The plain 25 is a different animal, and could be a good buy as a starter unit.