There are collectors all over the world, and in the continental USA from coast to coast.
Many are local collectors. We in California are fortunate to be so close to Nevada, but Florida is not a day trip away.

My professional society rotates their annual convention from east to midwest to south to west from year to year.
New Orleans, AC (well maybe CT or FL), Chicago or ???

I realize Las Vegas is the capital of gaming, but just a thought for those who want to attend, but can't due to distance.