I work in clothing, so I know a few things about steamers. Whatever you do, DO NOT buy the Tobi steamer
. It is such a rip off. My FIL has this one and it sucks compared to a professional steamer. The one we use at work is a Kobe steamer. It's a professional steamer and I have seen it priced at around $169 Canadian. I looked it up online and didn't find out much about the Kobe (like where to purchase it etc.) I think as long as you spend enough to get decent quality, you will be okay.
One major piece of advice- Only use distilled water in your steamer. If you use tap water it will get so clogged with calcium and it won't last. Using only distilled water should ensure a long life for your steamer.