If fluid is coming out and coming out clear than I would doubt the caliper is stuck. A stuck caliper is almost always due to corrosion and clear fluid is unlikely to come from a rusted up caliper. Maybe a bad re-man unit?
If there is pressure at the caliper the master and ABS aren't suspect. The caliper slides would need to be seriously seized to prevent ANY movement(you can turn the wheel by hand with brake applied) which would usually result in a dragging brake.
Is this car new to you? The probability of what you are describing is very low unless some one has botched something or perhaps the car was unused for a long time while in a corrosive environment.
Clear fluid tells me it was recently bled though, what is the rest of the story?
Regardless, if there is adequate pressure to the caliper a fresh caliper and hardware ought to solve your troubles.
"The gas pedal wouldn't go to the floor if it weren't meant to be there"
Reply With Quote