Good advice - also:
Check seatpost is free and snug and has decent insertion.
Look down along the length of the seatstays for visual evidence of damage to them.
Fit some wheels and check they are aligned vertically by sighting from the rear of the frame a little distance back.
Also check clearances on down tube for evidence of frontal impact, and fork crown / chainstays / seatstays for symmetry.
Good advice - also:
Check seatpost is free and snug and has decent insertion.
Look down along the length of the seatstays for visual evidence of damage to them.
Fit some wheels and check they are aligned vertically by sighting from the rear of the frame a little distance back.
Also check clearances on down tube for evidence of frontal impact, and fork crown / chainstays / seatstays for symmetry.