As a Elevator repairman for 40 years. Office buildings was the norm. weekly and monthly service I would find mail dropped into the elevator pits. Sometimes just a few and at one stop what would be a whole tray at a State office building. So what it takes to get it out; security, a witness, and who it is addressed to as in office. Now the gap between the elevator and building floor is not greater than 1 1/4 inch. This makes the mail late by as much as 30 days, or what could by a late payment in some cases.
I had a building in San Francisco that the night cleaning crew would sweep floors into the pits. some times a 30 gal trash can full ( 20 story bldg. ).
I had herd about another Elevator man that did this. While cleaning the pit with the day crew to haul away the trash he dropped a $20.00 bill out of his pocket. He then says look a another 20 bucks today it happens all the time. So every now and again he would drop a buck or two pit were clean all the time after that. NOTE some elevator pits have acc. doors that the building have keys for.
As for your tube GOOD LUCK maybe E-Bay will give you your money back