I'm wondering if anyone knows much about the various finishes on ceramic/stoneware bakeware?

I saw some little pans for very cheap, and then it occurred to me that you usually get what you pay for. I know that there have been several instances of discount stores selling recalled or unsafe merchandise (From leaded glass to recalled Baby formula ) But, I never really worried beyond that. Of course, I never thought I had reason to.

Now, I don't want to borrow any more trouble than we've got...so...How can you tell if stoneware is good/safe to use, or not? Any ideas? (We are on a limited budget...I've stretched it out a bit to deal with gluten free everything free...er...everything, but, its still there tapping me on the shoulder.)