I purchased these valves out of a large lot that was left over from the refit of a yacht.
The air-conditioning contractor Had left them in a box under a table, He had put threaded plastic nipples in each one but apparently they never got used.
I am selling them as used, but it is my strong belief they were never installed.
The shipping cost is for 1 but if I bundle multiples in the same package, the price does not necessarily go up by much.