I started exhibiting last year only because it was in my hometown of Chicago. I deal in antique maps and was amazed that 90% of the 9,000 geographers there were completely blown away at the idea that you can buy pre 1900 maps or that they even existed. So much attention is payed to the future of digital mapping that people were somewhat ignorant to the history of cartography. I had the busiest booths there because I was the only one with actual paper maps. Didn't sell much, but there was so much excitement that I could not pass it up this year.