I bought a set used for $50. I don't remember what they were. My husband said, "Well, you'll either kill yourself or figure out how to do it."

I was 48 then, and never have been the most coordinated ballerina at the barre (so to speak).
I never even came close to killing myself.
I got a set of Kreitler rollers (ebay) and sold the used ones for the $50 I paid.
I still only ride in the hall.
My riding form and balance (and confidence) have improved dramatically!

I don't have the Kreitler HeadWind fan, but sometimes I sometimes covet one. Usually I just turn on a normal fan, because it can get a little hot.