Hazy Shade in Dayton is a great store. They let you putt for a discount on each premium disc you buy. Seemed like good guys.
The PIAS in the Tri-County area of Cincinnati has a decent selection. Mostly Innova and Discraft, but I did find a couple of Evo Wizards for under $10 each.
I know there's a pro shop at Mt. Airy in Cincinnati as well, but I have not been to it.