Not like they dropped by 5x since 1.19

 

Chicken spawners are low-key great, they're the mid tier spawner from pigs being starter and cows being among top tier, chicken spawners currently sell around 750k, selling them for 1m would be a good price if we could utilise them fully.

Unless actively killing chickens by hand, the eggs from a chicken spawner fast add up and block all hopper chest systems. I could auto cook the chickens to get around having eggs, but then we miss out on being able to use the eggs properly and only getting half the possible fsrm profits from that spawner

 

They were never worth what players were paying for them.
All you need for chickens is a few stacks of eggs, then you can make a setup that auto hatches them that generates chickens a lot faster than any spawner could.

750,000 eggs every few minutes at 0.01 per egg is $750 every few minutes and you're starting to rival the income of a 25 chunk melkin farm, simply by standing in the pile of eggs and autoclicking in the /shop GUI which, unlike /sell all, has no cooldown.
At a point, I had about 50 stacks of chickens of size 99,999. I did this with zero spawners, just started with a few stacks of eggs.
They would enable me to sell an inventory every second 24/7. And at 0.01 per egg, which I assume is the cheapest they could set it to, I could make over $1,300 per minute which comes close to the income of a 5 chunk cropper wheat farm.

Add eggs to the /sell all command by all means as that has the cooldown, do not add them to /shop or you will break the economy.