Cracked glaze on new-looking used thrift-store...

I've recently purchased a Rival crock-pot
similar to one we had for years which I inadvetently
broke last year (carrying it up from the basement and
tripped over the cord--had to make a whole new dinner!).

I saw one just like it at the thrift-store and looked
inside at the crock--it looked as if it had never been
used once!

I got it home and put water in it and set it on "high"
to see if it was functional.

It boiled the water, but when I dumped the water
out later I noticed a web-work of dark spidery lines.

This was cracks in the clear glazing which had allowed
water to seep into the actual pottery and darkened it
by wetting it. That indicates foodstuffs would also
work their way into that porous part ofthe crock, to me.

Is this going to pose any sort of safety hazard as regards
exposure to products of spoiled food? I'd always heard it rumored that the advantages of cooking in this way were
that the crockery gets flavors absorbed into it and passes them on to subsequent meals. That would indicated that such a condition may *not* be any problem.

I want some reinforcement or an answer here before I go preparing any meals in this appliance. If I get the "thumbs down" in time I can probably take it back to the thrift store and get my money back---I have a week on that.

Thanks in advance for any advice on this.

--Bobby Z./therealgunboy@yahoo.com