thepircs,
The closest stores to Butler worth visiting are Under the Sea and Seahorse.
To get to Seahorse, take route 8 south about 1/2 mile past the turnpike ramp and the store will be on your left.
To get to under the sea, either take the turnpike one exit west to Cranberry township and follow route 19 north for about two miles. The store will be on your right in a shopping center next to a rite aid.
Alternatively, from Butler, take 422 west to 79 south. Exit 79 south at the Evans City exit and follow route 19 south for about two miles. The store will be on your left.
There are other stores, but most will take you almost an hour from the Butler area unless you are very close to the turnpike.
Enjoy your visit!
Adam