I can tell with 100% certainty that the boat in that ad is not even close to Comp based off of the amount of freeboard it has plus the interior layout. This is what a Comp looks like. IMG_4061.jpg

You will need to check the stringers, specifically where the engine mounts to the stringer for rot. Any plumbed in ballast was added after the fact and you will want to make sure that it has been done well so as to not create further issues down the road.