I don't know how much interest there would be here but I have a used but nearly new looking Cole Palmer Masterflex L/S Economy Drive Peristaltic Pump (variable speed knob) with two (stacked) EZ Load heads on it. This means you can pump two isolated liquids at the same time at the same rate.
The catch is that it can only accept tubing at like 3/8" OD max. I bought it on a whim thinking I might be able to jam larger tubing into it for a fly sparge but it just didn't work out.
I'll likely put it on Ebay to cast a wider net but if someone here is looking for something like this let me know.
The drive alone retails for $589 new. The EZ Load heads go for $188 each.
I'd be happy to get $250 plus actual shipping. BTW: It's a 120v version.
Masterflex small sup reg sup small L S small sup reg sup small Easy Load small sup reg sup small pump head for precision tubing PSF housing CRS rotor - L S reg Easy Load Pump Heads for Precision Tubing from Cole-Parmer