Increasing the sales price lower limit

As my wealth rose i moved up the price scale.  For example, right at the start of all this in 2020 i was buying Missile Blueprints for 600k and selling them for 2 million and feeling like a hero.  Then i was buying items for 1 million and selling them for 3 million.  Then buying for 10 million to sell for 30 million.

The point is, as my wealth rose, to move the dials i needed to sell higher priced items.

Remember, i go for low volume so i can' t reply on the low priced items selling like hot cakes.

Until recently, the rule was that for each sale i needed to make at the higher of 100 million profit or 25% profit margins.

I have now changed that to only dealing in items what sell for at least 500 million isk.  In other words, the cost is at least 375m isk.  I may just shift that to being the cost must be 500 million isk.

The exception is implants where i will still aim to sell the entire family.

The other exception is my foray into manufacturing where i am just exploring the methodology for now.

So, now gone are the days of selling mining lasers, mining upgrades, small sized ship equipment items, etc.

But what i am trying to do here is also control the time i spend on my business. And one way to do that is to cut out selling the lower priced items and focus on the big hitting items.  I want to focus on getting 

I also need the time to focus on manufacturing.