Not long ago I found that these are the most common Hybodus fossils available, and they sure can demand a high fee (don't think I've seen one for less than $50). Anyways was just curious if anyone has experience handling them (or expert opinion) and know if they're replicas or not. Here's one example https://www.fossilera.com/fossils/3-7-hybodus-shark-dorsal-spine-cretaceous. Please & thank you.