I also live in a condo end unit. 2 nd floor bathrooms do not have any windows or duct hole going outside. Even though they have an outside wall a window was never put in. Built 1985.
It is not a big deal Linda. Just have them or you can purchase a fan/light to install on the ceiling. Costs $20-50 + installation. Then at least you will be sucking the air up and out of the bathroom so you dont have to worry about leaving the door open when you shower or do your thing.
Good luck. Its no big deal..Buy it if you like the property.