First aveo

Hi all

Looking to buy my first aveo.
Will be a 2011/2012 automatic 1.6 model.

First test drive with one with 80k kms.

It has a slight clunk when you engage reverse from park.
no issues into drive and the test drive was good. Smooth no bumps or lurches.

Is this clunk common?
is it due sn atf change or could it indicate a more serious issue?

Thanks in advance

Going to view another tomorrow 2013 model with just 62k kms. Looks very tidy. We'll see how the reverse works