I just got a mityvac and love it. The one I got
was $31. I didn't get the elite version since this is the only thing I use it on. Out of all the little end things that came with it, there was one that fit perfectly in the bung hole (insert Beavis laugh here). I have my carboy in my office where it is warm and I am usually parked so I kept the pressure between 15 & 20 for a couple hours. I was amazed the next day I could see a flashlight through a cab. I whipped the $%!& out of it with a drill and couldn't see anything through the murk. They got me believing. I just checked eBay and there are some there for even less. Not sure the quality or reliability though.