I have read here where MTH Realtrax is getting hard to find, and some folks have been looking for it. My wife and I visited a small antique mall/hobby shop today, and I noticed they have several boxes and piles of Realtrax. Looks like there is flex track, curves, switches, and more. I think most of it is new, but their might be some used also. Since the place is not an advertiser, I will not mention the name. It is in SE Ohio, and, I do not even know if the guy will ship.
However, if you are interested in Realtrax, send a message to me through the profile link, and I will give you the name and phone number of the store.
Note: If this type of posting is not permitted, then please remove. Just thought this might help some fellows out.