I have heard that CBD is extremely great as a natural anti inflammatory however the strains that get recommended are so absurdly expensive. On the order of 30ml for 150$ for charlottes web for example. Is it actually worth it? How long does that 30ml bottle last for 150$?

The bottle lasts approx 2 weeks with 'correct dosage'. And that price is the higher end product. I am familiar with the mid-range product which I used for 1.5 months (due to pain) and discontinued it because I honestly couldn't really tell the difference.

Yeah this is quite disheartening to hear. 300$ a month for something that some people can't even tell the difference with. I don't want to spend 150$ for 30ml of snake oil haha.

My wife has a number of health issues (chronic knee pain, low-level anxiety, CFS). She tried the same CBD oil for about a month and found it had no effect one way or the other.

you're referring to the LP prices, i.e the "legal" stuff. you can buy far higher quality CBD strains at dispensaries, or even black market dealers, for cheaper.