the unmanned durable goods sales facility disclosed herein utilizes a commercial property site which is accessible from a public road . on the commercial property is a fence with an entrance / exit gate that is controlled by a proximity card reader . inside the fence is a building housing durable goods , in this case heating and air conditioning supplies . access to the building is also controlled by proximity card readers . approved customers leave records of receipts for the items purchased with the facility operators . mechanisms are in place at the sales facility to help customers who encounter problems and also to cope with various emergencies that may occur .