Out of curiosity

How much would you price this make shift item:

Afarads mirror
- face mask (blank crome, shiny)
- 4 white sockets
- no stats
- you have a permanent mirage echo + divinity shrine buff (immortal)
- 90% to 100% less iiq/iir/exp gains/loot

Basically it would allow you to do a training run on any boss you want, or get kill credit/unlock more atlas stuff, but heavily reduced exp loot etc.

So technically no drops from any boss.
Just a safe training mode, with the cost for whatever map token you need to enter.

You think some magic find builds would pump iir and use it anyways,
making it a mirror or 100 div at least, with 'perfect' 90% roll,
or would it be just 'fun trash for noobs' to learn a boss fight,
and stay at 1-10 div?

Don't care about if you think it's good or bad,
just say what you think it would be worth roughly.

This item would not get made as GGG is staunchly against player defenses and survivability. Just look at the sorry state of base defenses, none of them even increase your EHP.

You ask people to price an item but don't even bother explaining how rare it would be?

I'll price it at 1c-1m.