Since you're in Wichita KS, you may want to consider visiting the Red River Renegade's annual Shotgun Soiree in Electra, TX, just 20 or so miles west of Wichita Falls TX.
This is a very well attended event and draws people from across the country. It's basically just a drive across Oklahoma for you.
There is usually selection of shotguns for sale on the trading table there.
Shotguns are addicting.
http://www.redriverrenegades.com/news/2013-shotgun.pdf