I'd love another TT Aerotop, the auto box is great, and I can live with the scuttle shake. Not many around now and they are getting on in age now, but there are still enough around to give you a choice....so it will pay you to take your time and look at several if you are prepared to travel.
If age is an issue to you, TT Aerotops stopped being made around 1995, non turbo Aerotops stopped being made around 1998.
Have a good look at the roof seals and locking bolts on any car you view...its common for an owner to lose the original locking ratchet tool for the roof, but this isnt the end of the world as an allen key can be used...just check that the locking bolts actually work. The roof can sometimes leak even if the seals look in good nick...in my experience this can be down to blocked drainage channels, again, not the end of the world and can be fixed. The seals can be replaced at the end of the day. If the rest of the car is fine, it may not be a deal breaker.