need some advise on a 2003 boxster

[Abby997TT]

Hey guys,
It's my first post here. How's everyone doing?

I am looking at a 2003 boxster with around 30k miles. The car needs some cleaning, but over all it's in good shape.

It was regularly maintained, but it has been parked un-driven for a few months at a time for many times without proper preparation for storage. (hence the low mileage)
Most times it was staying in the garage, but last time the car was left outside in the rain for like a year. The owner did start it every month or so to let it run for a bit. The The car needs a major detail and I will get a PPI done if I decided to purchase it.

What do you guys think? do you guys think i will have problem down the road from improper storage?

Thanks in advance!!