why is there no pump, how are they using it? (or not)
i would think its a rotary pump - procon / rotoflow etc
and you woudl need a motor as well (assuming nohing comes with it)
at $485 for pump and motor.......
it might be possible to get a 2nd hand one but it might have unknown issues as well.
i often wonder if you could use a vibe pump on one of these and a simple tank of water?
I like the look of those san marcos :)
PM the details me if you dont buy it :).....