Bachmann lists prices high to give the dealers a break. Don't resort to new from them untill you have exhausted other avenues.
You don't mention how old the track is. FYI, IMO the new age nickel silver is way better for the track wheel to connection than the brass or aluminum of the past. It just stays cleaner, and that makes for better running.
There is more than one trolley system from Bachmann. Choose careful because I think on one, a portion of the sensors are in the trolley. I think there are others offered by Dalee or Electric RR too. With help in the electrical forum, it would also be possible to set up your own system with relays, boards or what have you.
