Should I be worried about running out of stock?

I am quite new to this, only about 1 month in, after 5 months of China negotiations, production, sea freight, etc .. i started on the advice of my friend who’s been doing this for a few years. He said that it’s very important to never run out of product and let a listing go inactive. All of his products are small, cheap, lots of competition. My product is large, expensive, mostly business customers, and only has 2 competitors.

With such a niche item, should I be worried about running out and losing visibility when I get more? I’ve already ordered more but it won’t be here for about 60 days and I’ll probably be out of stock in less than 30.

Also, I raised my price mmby 4% a few days ago, and sells didn’t slow down at all, and I raised it again by 7% today, and I lost the buy box and had to backpedal. If raising prices further is the right choice, how can I do it without losing the buy box? I also think it’s odd that I lost it because the next closest competitor product is over 50% more expensive. And yes I have a brand, and brand registry and all that