Get ready for pain.
There are currently three skus out in the wild for each SP-01.
One SP-01 (cheapest) has fixed 3 dot.
One SP-01 (cheaper) has a fiber optic and luminescent glow paint fixed rear.
One SP-01 (more expensive) is full night sights.
I feel that when the Shadow 2 went wild, CZ absolutely gave up on the SP-01 and the skus just went wild.
Proof is the newest SP-01 with the red or blue grips and mag bump covers. Almost no upgrades at all but color, but CZ is charging Shadow 2 prices. Both new color version come with either night sights or fiber optic front.
needless to say, you have an extremely long journey to find what you want, find what that sku is, and then find it for reasonable prices.
CZ sights are known to be small. I personally don't like their sights. Others love them, but do they love the cut or the size? Two different things. I find them physically small.
My SP-01 Tactical with night sights was $600 in 2019. I didn't like it and sold it. Shrug.