$60 is a great find!
I'm smoking salmon on my UDS right now, I was able to get it stable at 120 for a couple of hours, then 140 for a few more, then 175 to finish. It takes a bit more fiddling than trying to keep it at 225, but I didn't think I'd be able to keep it that low at all without smothering the fire. But I had nice smoke wafting out of the bunghole.