Shop 'N Cart Convenience Stores is Grevco Inc. and has been serving Sioux Falls, SD since 1967. LOCALLY OWNED, second generation family operated with 6 locations. Fast and friendly service has been the cornerstone of our business for over 47 years. All of our locations have liquor departments and tobacco pricing is the lowest allowed by law. Four of our convenience stores have BP, Mobil or Sinclair fuels. One store has a brand new, state-of-the-art automatic touch-free car wash.