Authenticity check: Book of the Dead replicas vs. genuine artifacts

I've been looking into Egyptian artifacts, specifically things related to the Book of the Dead, and I'm getting confused about what I'm actually looking at. I found a few listings online that claim to be genuine, but I'm worried they might be high-quality modern replicas. Does anyone who specializes in ancient Egyptian items know how to properly authenticate these? I'm trying to determine if the pricing I'm seeing is reflective of true historical value or if it's just for modern decorative pieces. Any advice on reputable dealers or what specific details I should check for would be greatly appreciated.