I keep meaning to try them and never getting around to it.
I did look into automating the drapes, ideally with a small electric motor on a timer. It seems like something you should be able to do for $200 or so, but I couldn't find gear that would actually just list the price...
I'm afraid that may be a low estimate. I thought the same and was shocked at what prices I could find. I ran into the same problem of finding prices, too.