Hello. The words "under $100" and "Tom Petty" do not appear together under normal circumstances. Relying on papers or some opinions for a whim purchase of this subject is a recipe for disaster. "Quality" and "low cost seller" are often strange bedfellows as well. Study prodigiously and only then, at the last, you purchase IMO - knowing what to look for, what is authentic but not desirable, his signing habits when and where etc. and so much more. This is where the fun is - otherwise I'd feel like I am just purchasing a list of names with opinions from other names.