Hi guys,
Typhoon H supposed to be manufactured in some 100.000 units. To be more sceptic, say: 50.000 units were to be done, as many as unpaid batteries to subcontractor. How many are really sold is doubtfull, but simple calculation for parts' cost can always be made.
Motor pod and hinge are made on injection process of ABS, one of the cheapest plastics available. Low tolerance and complexity make injection mold a bit more expensive than wooden or plastic vacuum, but nobody make professional metal multicavity moulds in garage.
Tolerance of 0,05mm is standard, 10times more than required. Say: 6 cavity water-cooled professional mould cost USD10000, for 50.000 drone arm units means USD0,033/piece in mass production plus cost of material, say: USD0,15 for 4g piece.
Taking into account all general costs one dollar would be more than enough to pay hinge at factory. Tube is worth some another USD1 with CNC maching 2 holes, motor pod cost similar to hinge, another dollar.
Somebody must rivet parts into ready arm, pack into plastic bag and dispatch to factory warehouse. USD5 is factory price at max. 1000% overhead, stock, dealer margin is a fact. With low tolerance ... Landing gear with plastic tee might cost some USD3 at factory,
I can provide stronger all-carbon replacement with 2 foam dampers as low as US9,9 +pp.