Yo Dude.
I have a TD06-19c On my RB20DET, Its internal wastegated and bolts straight onto the stock manifold with a 10mm spacer plate (to avoid rubbing the block).
They dont have water lines at all as they arent water cooled. You would wanna get the oil feed and oil return lines with it to save hassles.
As for price that isnt too bad. I am selling my Td06-19c, dump pipe, silicone outlet pipe, braided oil feed, oil return, spacer plate, intake pipe etc etc complete bolt on kit for $1600
They are decent turbos. Tho you will have a bit of lag... its all fun and games once on boost my 255/40/17's manage to light up on boost