Last Weekend I was in Denver and made my trip to Mizell Trains. If you are into tubular track they have some great sale items. I picked up a O-22 switch for $2 bucks, works just fine - the controller was $3 bucks. I also got a 6019 remote control track ( no controller ) for $1 buck. Also they had the K-Line type uncouple tracks, ( O-27 with the single red magnet ) for a $1buck each. Got 2 of those. What a deal ! The uncouple tracks I will take the center rail with magnet out and splice it into my O-31 track so I can have more uncoupling options for switching.
So if you are in Colorado and into tubular track check out Mizell Trains. They have boxes full of track, boxes full of switches ( O-22, O-27, Marx ), a box with O-22 switch machines, all kinds of stuff.
Steve