I started talking with a guy that has some used equipment. Thoughts??
Personally I would stay away from used equipment from secondhand. Maybe the used section in the grow store might be different but chances are something is funny when dealing with used equipment. Unless you get it at a remarkable low deal I'd not do it. Anything could be wrong with the ballast and those are 250$ for a CMH.
Last week my 315 CMH ballast went out and I was panicking. I took it to my local grow store where I purchase everything and they swapped it off the shelf with no cost, luckily my 3 year warranty had 2 months left.
That's what you are paying for when you go to the grow store, the ease of warranty to swap it out without sending it in. So if it's an emergency item like a ballast go through the local guy so don't have to send shit in. Amazon has warranty policy aswell but you have to wait, don't want to be stuck with your plants in the dark and no money for a ballast.
Oh yeah sometimes the local stores have ballast + bulb deals that might not be listed. It's worth asking about.