How much do salons charge for a full head of weave?

Depends on what salon. If you go to someone who is really good (which you want) someone who can make your hair grow, and use weaving methods that look good and natural not bulky and cheap, you are honestly looking at anywhere between 450 dollar to 2000 thousand dollars. You just gotta go down the list and call a ton of shops to make sure who is right for you. Also, see about maybe getting free consultations so you can see some of their work.