Yes, I tried it just before writing the post (and multiple purchases over last few weeks). That's how I knew what the filter for newegg checkbox was called.

It's not that simple. For example. I went to my local auto store for a new air filter. Their system reported they had 1 in stock. Went to shelf. It is not there. What happened? Well, it could have been stolen. Easy item to steal. It could have been picked up by a customer and dropped elsewhere in the large air filter aisle and would show up next time a general inventory was done. It could have been randomly dropped by a customer anywhere else in the store, or moved to a special display section then not moved back. It could have been purchased, returned immediately undamaged, then not moved back to the shelf... Physical stores are hard.

And Target has a far larger inventory.