I just got a bike alarm from ebay, member cowy07. It took 20 days to arrive. I really like it. It is nice and loud and has a nice up and down sound to it. You attach to the steering and arm with a key. Any little vibration will set it off. Seems like a good added layer of protection. I didn't post the link because I'm not sure if it's ok to post ebay listings. It was 12.98 shipped total. The bracket is plastic, may need replacing eventually.