TUSA RS-860. Why cheap online? Service part availability?

[walkonmars]

Hi Folks,

Just wondering if anyone has had much experience with TUSA regulators and servicing them?
I'm looking for a couple back-up regulators to use as stage or pony bottle regs (light and compact). On Eee-bay, there are a few people selling the RS-860 for as low as $120 but typically $150 or so. Did they suddenly closeout lots of these or there were some safety issues? That is awful cheap for a new reg. Also, i'm looking at servicing my own regs and wonder about availability of parts. These are balanced piston designs. I usually service diaphram types and buy the service kits. For piston designs, am I just buying generic seats (teflon?) and packs of viton O-rings? I could not find a service kit online for the TUSA piston regulators.
Another regulator I considered was the Aeris AT400 but cannot find a service manual or bulletin online anywhere. Are Aeris regs just re-branded copies of another brand?

 

[runsongas]

looks discontinued on the tusa website. servicing will depend on if it will take a generic seat or a subgear/scubapro seat. tusa is not that popular and i rarely see their parts kits pop up.

aeris is a discontinued brand from AUP. a lot of their stuff was sold both under aeris and oceanic.

 

[walkonmars]

Thanks, I ended up ordering an Aeris AT400 to try out. I'll use Oceanic service manuals and parts for re-builds.