I think it's slightly smaller than york, but it's still a major event worth attending... I have been going the past 4 years. Prices are good and most people selling negotiate fairly. What I really like is the clinics and seminars that are put on at this show. I went yesterday (Saturday 1/24).... and went to an airbrushing clinic which was really worthwhile. They provide you with an HO freight car, and you get to weather it a nice Iwata air brush..... Having never airbrushed anything before it was a great way to spend an hour off my feet learning something new.
I also attended a really good clinic on LED lighting. So all in all I really like the Amherst show... Two years ago, the company with the cloud stencils presented, I liked them so much I bought them..... I have (8) 4 x 8 sheets of 1/8 inch masonite painted blue sky with clouds that my daughter spray paints for me.... With over 70 running feet of backdrop, purchasing preprinted backdrops was out of my budget.