@texmc you could also look at inventory status to support this need. The virtual location mentioned above also works well.

thanks man. will inventory status remove it from available for sale?

You can make it not pickable yes, warning: once inventory status is on it can't be turned off.

also is inventory status at the item level

Inventory status also impacts how you record all inventory transactions in some respect. Test it in a sandbox first

It essentially adds inventory details so it's not by sku but by quantity