The guy said he was heading home but stuck around to help you. What time the store closes is irrelevant. You don't know the time the salesman started. He gave you a price for a fitting but told you that price would be diminished depending on how expensive the bike you purchased was. He's just quoting store policy and being honest up front. He showed you numerous bikes and tried to give you an idea of what he had available in your price range. I felt he did a pretty good job overall considering you told him you had no intention of buying anything at that time. But like others have said, if you are uncomfortable then by all means shop elsewhere.