Mammalian Vertebra Bone

From images, this appears to be a thoracic or lumbar vertebrae from a mid-sized mammal. Perhaps a agricultural animal like a dog, pig, or goat. It could also be from a wild animal such as a deer, coyote, or boar. This example is not a fossilized example, rather it is a bone section. It is possible that it is a human remain. If it is a human remain; it is not an artifact that can be legally sold and should be given to local authorities for evaluation. I suggest you reach out to a regional forensic anthropology department of your county or city to confirm.