I bought two new peristalic pumps and have since sold one, the other is sitting in the closet. You can have it if it meets your needs - AquaMedic 3000. Used it for a few days and didn't like it. Someone was going to buy it, but they haven't ever shown up.

The Magus doser is the best investment I made this year (except for my way cool lights). At the time I bought it I was having a hard time justifying it. Now after only using it a few weeks, it was nothing and my [tank] life is so much simplier.