How much does a manpad cost?
Estimates of black market prices for MANPADS range from just a few hundred dollars for basic technology models to thousands for more advanced units. The Soviet Union supplied its allies with MANPADS and apparently, some were re-transferred to non-state actors or stolen.
Man-portable air-defense systems (MANPADS). Place of origin, Soviet Union ... In 2003 the unit cost was approximately US$60,000–80,000. Large numbers ...
You answered your question. It depends on what generation you want. Whichever you choose, the battery life and availability of fresh batteries is key because. that will determine the feasibility of it being employed.....or being used as a door stop. Some environments suck the battery life sooner than others.