There are so many choices when choosing a remote shutter timer. I am looking to buy one to use for taking extended exposure shots with my t3i (600d). I've found a few for pretty cheap on eBay (<$20). I am a bit skeptical so I'm curious if I need to look at something of better quality since I'm used to photography equipment costing a small fortune. Since they pretty much all do the same thing; does it matter? Also, any recommendations would be greatly appreciated.
Thanks in advance.