I started my first tank with AA and have bought all of my plants and some of the deco from there. Other places have deco and accessories way cheaper though; Walmart, Meijers, even the Anderson's store which coincidentally is right behind AA.
Most of my fish, however, have come from Jack's Pets at Mill Run. Shorter drive for me and they have a very good selection. Watch the salesperson carefully though; I wouldn't say they're all natural fish-handlers there; just my opinion tho. Jack's stores are found around much of Ohio, for those who aren't in the Columbus area.
Went to Petsmart yesterday; their food stock seems to be at a good price. Fish selection was disappointing. Have to wonder whether these places got picked over at Xmas time.
All cwt posts are implicitly appended with "just my two cents".