Have you looked at facebook marketplace? Lots of bikes in our area.

Pontiac rec is tough on a hardtail due to being both fast and rocky. Otherwise most trails are fine. I was riding Highland on a full rigid. Actually rode Pontiac on full rigid but swore I would never do that again....

ETA: not a lot of hardtails for sale right now. Kinetic in Clarkston sells Salsa bikes. The Timberjack is a good bike for the price. When I was looking, Santa Cruz Chameleon, Salsa Timberjack, and Trek X Caliber 2018 were all well priced, modern geometry hardtails.