Warm Air Rises and I'm on the Top Floor

It is getting warm here in New York. Well, actually, it's just getting humid. But living on the 6th floor of a 6 floor building, I'm starting to think the heat is attracted to us. Poor Nerms has been really upset about the heat. I hooked up the A.C. unit last night and she was purring in the wind-literally. She wouldn't leave the air conditioner's side. So I'm off on a quest to find a cute fan, so that during the day the air moves around a bit.

I found these on e-bay and just think they're way more attractive design-wise than the newer ones I've seen at places like Bed Bath & Beyond, and Target. Anyone know anything about vintage fans, such as do they even work? How much should I think about paying for one, the bids start as low as $5.