I'm an old live-aboard instructor with a ton of extra equipment. I now only work during the summer and don't have need for all the equipment. I hooked up all the regs this weekend and they all work and breathe fine, but it's been at least 3 years since they've been serviced, and I would definitely have them serviced or at least examined before taking them under.
Scuba Pro MK25 Din w/ R395 2nd Stage & Suunto SPG (<50 dives) - $300 OBO
Atomic B2 DIN 1st & 2nd stage w/ DIR SPG (roughly 350 dives) - $200 OBO
Apeks XTX 100 w/ 2nd stage & octo (<150 dives) - $300 OBO
Scuba Pro MK25 Din w/ R395 2nd Stage & Suunto SPG (<50 dives) - $300 OBO
Atomic B2 DIN 1st & 2nd stage w/ DIR SPG (roughly 350 dives) - $200 OBO
Apeks XTX 100 w/ 2nd stage & octo (<150 dives) - $300 OBO
