The price is not bad especially given the prices of used cars today. In addition to the roof issue, I would want to know the maintenance history of the car, especially if the timing belt has been replaced. A Carfax would be valuable.
The problem with the roof means the you cannot get at the seals to make sure they are properly maintained and lubricated to prevent water leaks into the vehicle. Dry seals also mean a lot of noise. The top is quite a complex mechanism and not usually easy to repair. You may need to take it to an authorized VW dealer ($$$ x 10^3) or to a very good and experienced independent VW mechanic who has prior experience with maintaining Eos roofs. My mechanic, who specializes in VW, Audi, BMW, and MB, has told me he has no interest in working on an Eos roof.
Also, you want to make sure you can open the trunk.
It is generally an expensive car to maintain and operate since it takes 91 octane gas and synthetic motor oil. Tires are large and on the expensive side due to size.
It is an enjoyable car to drive and handles well (a roller skate with radial tires) . I hardly drive it with the top down. If you have some confidence in the reliability of the drivetrain, you live in a dry climate, and can generally park the car under cover, it could be a good deal.
Let us know what you decide.