Just made my "early bird" purchase of the 2017 TCA convention car suite. If you haven't seen the offerings there are some great cars this year in O, O27, S and Standard Gauge. Sure, I am biased as the former chair of this committee, but I can't take credit for anything other than having a great team of people to work with to come up with concepts and decide on the final offerings.
This year has lots of options for people who like multiple numbers and multiple road names for the same car. The scale flatcar is probably my favorite, but I ordered all of the cars since this is a great fundraiser for TCA.