I just went there and looked up the item you mentioned.  The part at the bottom looks ok to me and has normal pricing.

If that is in fact what you saw, then it was a glitch as you said, and has been fixed.

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi