This thread went nowhere in hurry.

Yes some shops would have taken the plane back. Good customer service or just being foolish? Hard to tell since no one here knows all the details or has inspected the plane.

You did the right thing by inspecting the plane before leaving the store. Since you decided to purchase it anyway, maybe a couple more steps should have been taken. One ask for a discount due to the less than ideal condition. Two ask the sales person if you could return it if you have a change of heart (which you did) or find more wrong that you don't want to deal with.