Yeah, brand new bicycle bought yesterday. Rode it once. Stolen from my garage. The guy broke into my garage, cut the chain, and stole the bike and ONLY the bike. $200 goes flying out the window.
I'm sorry for your loss. Next time put the bike in your apartment.
And don't spend $200 on a bicycle.
Also this. 200 buck bikes are -mostly- pure crap, unless you had some primo oldskool parts put together yourself.
Normally, even for roadbikes, the absolute minimum you can spend is around 500 dollars/euros, else you just get subpar parts (well, maybe not if you go singlespeed / fixed gear).
I know aquizzar meant it differently, but seriously guys.... 200 buck bikes... you might as well burn your money. Youre SO better of spending a bit more ONCE and then paying attention properly.
And just for the record: top three places where bikes get stolen most often:
1) stairwell
2) backyard
3) garage
I'm not kidding.
edit: and if you're looking for a proper bikelock, get a
kryptonite u-lock (or similar quality). Everything else is just a waste of money, again. Cable locks never ever ever work, I do not know why people even use them to secure a whole bike. I use one to secure a wheel that has a quick release which I always want to keep there.
It's important to always remember EVERY lock can and will get broken/picked. The trick is to get a lock (and a place to put your bike) where thieves will take long enough and will have to make enough noise so they wouldnt even try/would take to long.
Ive been a cycle messenger for almost 3 years and I own 4 bikes that are ready to be put on the street (together they're worth close to 10.000 €) and a few more that just rot away slowly

The good stuff sits in my apartment, and sometimes I even put one in the bedroom, just because they so pwetty

- I think I know my bike-lore. Oh, and I had about 5 bikes stolen already, too.
But not since I followed the same advice I gave you. That's something my bikedealer taught me, and it served me well so far. *knocks on wood*
edit2: if your bike dealer didnt tell you that a 200 buck bike is crap and a cable lock never works and every lock can be opened without a key.... get a different dealer, because he might as well just be an ass that doesnt care for your biking experience but just for your fucking money.