Doing one thing to many cards

Ticking rows makes a bar appear that changes every ticked card at once.

Bulk actions

Tick a row and a bar appears under the toolbar. It acts on the ticked rows and nothing else.

The tick box in the header selects everything you can see.

Set this price writes one number to every ticked card, and each one then reads Set by you. No rule ever moves a price set this way.
Set this condition changes the condition of every ticked card. A market price is a Near Mint price, so anything lower cuts each price on the spot.
Set finish and Set edition appear on a card game batch. They write one answer to every ticked card, and Not set clears it. The title and the price follow.
{{Wand2}} Use the market price puts each ticked card back on its market price. It skips a price you typed and a card we have no market price for, and it says how many it skipped.
Mark ready approves every ticked card that qualifies and names how many did not. See what qualifies.

A money box takes a dollar sign and a comma. We read $4.50, 4,50 and 4.50 as the same number.

The Ready box on a row does the same for one card. On a card that cannot list it refuses and names the missing field.

Every bulk change has an Undo on the message that confirms it.

Undo puts back exactly what was there, including "no price at all", which is not the same as zero.