Having a steamer is a definite must have if you are reselling.
I personally use a stand up steamer. The type you use depends on cost and how much you will be using your steamer.
I have used a small hand held one in the past. Yes, it was way cheaper than investing a ton of money on a big monster steamer. I quickly found that steamer was Not my thing. Fighting with the short cord got old real quick. The constant refilling of the tiny water reservoir drove me nuts. And, so, it got listed and sold.
I had planned on upgrading from my small hand held steamer as I got busier with my reselling. I actually did not spend my own money on my new steamer. It was purchased with leftover gift cards my husband had after the holidays. Even better!!!
I love my steamer. I use the Conair extremesteam upright. The water tank lasts forever and is so easy to fill. It has wheels and a long cord, yay! I usually hang my hangers on the rack and go to town.
There are way too many steamers out there at various price ranges. Do some research and choose the best to suit your needs and budget.