What dive-ready unit goes for 3k used? Even if you buy a 4-5k pre-DiveCan JJ, you still have to buy cells, service, likely some new parts, sorb, etc. and with training plus expenses you'll be pretty close to 10 grand.A used rebreather that is a bit out of date and not the hot ticket, but still good, $3k.
The 10 to 15 grand range I mentioned already includes buying used.