What's the circulation of the S Gauge magazine, if anyone knows?
Wouldn't on-line surveys provide more comprehensive (and less expensive) information
than attending multiple train meets/conventions which are limited by geographic access?
I'm also thinking that 20% of the hobbyists buy 80% of the product, so surveying that committed, passionate subset would be key to knowing what might sell.
On the other hand these are tiny companies (<100 people, sometimes much less) so high quality marketing research is not going to be readily affordable for them.