I am a college student and spend 9 months out of the year in an off campus apartment. I was wondering if anyone knows of cheap personal property insurance that would be good to look into to cover my personal stuff.

I looked around for renters insurance, but the few quotes online seem to all include building coverage. It seems that the apartment complex would have that covered as it's not mine. It's essentially rented like college apartments - there are three students all in the same apartment. We all have our own bedroom (with locks) and bathroom, but share common living space. It came prefurnished, so bed / dresser / desk / appliances are all owned by the complex as well, and they are required to maintain them as stated in the lease.

All I'm really concerned about is the stuff I've brought with me. I have a lot of electronic equipment and the value can add up quickly. I'd like some way to insure it against theft and the likes, but do not need coverage for everything else.
Additional Details
Thanks for all the responses. I was thinking it did include building, etc. because the online quote for Geico had a 50,000 min coverage, and about 15,000 of that was related to personal property and the rest was for like building or something, which didn't seem to be what I was looking for (under renters insurance quote on the site). There were also things included like health and things like that it seemed, which again is not what I wanted.