Dear Rick;
I have a set of Scott Schleh ceramics exactly like the one you described. It is signed "Schleh '87" and has a platform, used car building, and four individual cars. I was going to sell it on eBay, but didn't think anyone would appreciate it there. If you are interested, please let me know what you would offer for it, and I'll get back to you. It is in perfect condition, although the building was originally glued to the platform and the glue has come loose.
Kpedrick@comcast.net