Salvation Army 31015 Harper Ave, Saint Clair Shores, MI48082 The St. Clair Shore Salvation Army Thrift Store and Donation Center occupies nearly 26,000 square feet of space in the…More Shores Plaza on Harper Avenue. The store is clean, organized and well stocked with plenty of bargains for the entire family. Whether you are shopping for clothing, household items, electronics or furniture, the Salvation Army Thrift Store has endless treasures just waiting to be found. Purchases made in the store go to support the Southeast Michigan Adult Rehabilitation Centers which are 100 percent funded by store sales. Donations can be dropped off at the rear of the building during regular store hours.