Drilled holes turn me off, but should not affect the bow's integrity.
A slight twisted limb is no big thing to correct, so do not let that bother you too much. Stress lines/cracks is common, but if not too deep or lifing up, OK.
I mainly look for delaminations, tip damage, and overall appearance (which could show signs of abuse). Use a stringer to string it and gently flex the limbs a few times, and eventually get to full draw.
Price asked is fair, but no bargain, even though the Bearcats are pretty good shooters.