There is a quality gun show in Lima at the Allen County Fairgrounds and on the first weekend of each month until summer. Look up Tri-State Gun Collectors for info.
Once each year is a great outdoor show on Labor Day weekend at Swapper's Day in Johnstown. That same weekend, a similar event happens in Lima, again at the Allen County Fairgrounds, however this one is outdoors.
I like to swap brass... and I'm looking for .32 H&R Mag, .327 Fed Mag, .380 Auto and 10mm. If you have some and would like to swap for something else, send me a note!