Please forgive my rambling, I am not sure why but I tend to write confusing posts.
I have read through the various links, yet for the most part all I see is "between 50-100 for a good regulator" however I am afraid of spending 100-130 on a regulator which can be purchased easily for 50 used. (It's times like these where I wish I still had the software that showed all the ebay "sale" prices over the course of several years). Let alone the surplus place I had by me before I moved which had bins of regulators for 20 and under, needle valves for 10 and under. (All brands I know now, swagelok, airgas, harris etc)
Yet, what exact price ranges am I looking at? Assuming the regulator is "standard" used (has little scrapes, gauge arrow stickers etc.) If a conaco 212 is selling for 60-75 is that a "good" price or do you guys wait until you see them for 50USD/70SGD?
Also when do I see diminishing returns on paying aside from bling? Obviously labs need Special high purity but in our hobby how much money is just "ADA food dispenser" prices when it comes to purchasing a regulator.
Example is a CB200 2 6C 320 Max 3000 PSI Cylinder Pressure Regulator Stage on ebay right now.
Something like that for 190USD benefit me or is it all "flash" at this point? Is it offering me HIGHER reliability and accuracy? I still want to keep the entire setup under 300USD (which I was going to spend on the ADA unit anyway) . Under 200 for the setup? Even better ..
I am doing DIY to build something better and cheaper than offerings from retail vendors but I can see how EASILY I would end up with a 500 dollar "used" build , without even purchasing my co2 tank which I want to avoid.
So with all of that said, if I am building a "quality" setup with used parts (aside from the solenoid / tank ) what should my total "build" price be? Regulator 80? , Check valve 10? needle 15-20? , fittings (no idea on costs, I assume in most builds unless I find a cga 320 reg I will need to buy the cga 320 fitting also).
Also here are some shorter questions (just curious).
Is there a device which can go after a single stage to make it dual?
Is there any purpose to the knob after the regulator that I see on many regulators for sale on ebay or do you just take them off and toss em?
What regulator to tank adapters should I avoid at all costs? (regulator might be threaded weird, e-4 might be welded with superman stuff to prevent tamper etc)
Thanks for putting up with me good sirs.