variety store

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A retail store that carries a large variety of usually inexpensive merchandise.
• noun A convenience store.

from the GNU version of the Collaborative International Dictionary of English.

• a retail store selling a wide variety of items, especially of low price, as in a five and ten.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun US A shop where many small and inexpensive items can be bought.