RUN IT THROUGH A CARWASH!
I learned alot but I was mainly concerned with the top not having any vert experience. I don't know about checking the latches, seals, motors, etc. Please keep the info coming.
No joke, put some high pressure water on it!
The seals on the rear quarter windows, 'vertical weatherstrip' I think they are called crack and deform easily and leak on the panels to the side of the rear seat. Mine are so deformed that there is about a 1/8 gap now between the drivers side front window and this seal
I have the seals, but I have no idea how to change it!
With the top down and the windows up, open and close the doors several times. Do the windows fit nicely inside the little grooves in the rubber on the top or does it catch/pinch it?
There is some adjustment in the windows inside the doors to get it to do this properly but imho this is a little tricky and I would advise you to make sure it seals right the before you buy it.
How about the seals on the A-Pillars? Mine are old and kind of cracky but they still seal well.
A good upholstery guy told me that these seals are long-life parts and will seal well despite being kind of cracky but the biggest problems that are HARD to lick have to do with the adjustment of them.
Oh,
almost forgot, pull up the trunk carpeting and look for leak evidence, smell for mildew as
a failing top will let water into the trunk. A warped cardboard spare tire cover, especially with water stains will help alert you to this.