Agree with Jennifer. Anywhere from $50 to $60 can get a decent pedestal fan. We have one fan that cost us $80 (Bunnings) and it is absolutely wonderful. A bit loud, but the noise actually drains out the other noises around the house and provides a lulling humm in the background. Another $50 high velocity pedestal fan is also doing its job wonderfully (although both are quite heavy which makes it difficult to transport them from one place to another if required to move).
Well now. If I was living somewhere seriously hot then I would take a deep breath and invest in a Dyson Hot and Cool Fan, currently retailing at about £300 in the UK..... very pricey but supposedly a wonderful fan.
Aircon can't be fitted in all rooms.... and when we were thinking about it, we were renting so aircon wasn't an option anyway! Ceiling fans move the air in the room but they don't cool it. The Dyson fan cools the air but without blades, so it is very efficient and very safe. It could also be used in the winter as a portable heater.
Not a lot as nowadays those others without blades are out and far safer.
I still prefer air conditioning to fans and these pedestal fans are very noisy.
I would certainly not buy one for $10 as would not trust it.