I have a Canon 550D, and picked up my intervalometer from EBay for About $15 Aus. I have used it on numerous occasions without any problems. I find it a joy to use. Just dial up EBay and search for "Intervalometer " and your type of camera. At the moment they are from about $12 to About $45, and some even with free postage.
Y.O. (Yogie-One) Paul
