Decent Power Conditioner in the $ 300-$400s?

Hi:

I am looking for a decent power conditioner in the $300-$400 price range, used. It is for my second system that already has a dedicated line, but only two sockets. The system:

Eastern Electric Minimax Tube CD player
Wavac 811 amplifier
Kcs custom made monitors
Hsu VTF1 pair of subs.

I don't have any idea of units in this price range. I use an Exactpower in my main system, but I don't need such level of performance in my second system. Many thanks for your help. Pablo.