Make an offer. TWO NEW 25' Counterflow Chillers made with 5/8" rubber hose (good for hot water) and 3/8" copper.
These are very efficient. During a test run I turned on 55F coolant water not fully on and I cooled boiling water to below 65 with one pass through the chiller.
I already have and use one exactly like these. Got a good deal on the hose and copper. I made these to sell so I could afford to buy some other brew gear I've needing...okay, wanting. Asking $75 each, shipped OBO.
(The chillers are identical, though the pictures are of only one.)
(How I use mine: During the last 15 minutes of the boil, I recirculate boiling wort through them to sanitize, then at flame out turn on the hose ball valve I attach to the CFC input. Works very quickly to get to pitch-able temps and doesn't use much water. To clean I drain all the coolant water I can, boil water with Starsan and run it through hot for a minute or so to clear everything out. The I cap the ends and store with Starsan water in it. Never had problems with cleaning.)