Scroll of identify

The cheapest scroll in the game is the scroll of identify. The spoiler scrl-343.txt lists the cost at 20 zorkmids, thus making the scroll cheaper than any scroll except for the scroll of mail.

Facts
From scrl-343.txt:

identify
 * Always identified when read.
 * blessed
 * You can identify items from your inventory:


 * If your luck is positive, then 1 item becomes 2 items.
 * "This is an identify scroll."
 * uncursed
 * You can identify items from your inventory:


 * "This is an identify scroll."
 * cursed
 * You can identify one item from your inventory.
 * "This is an identify scroll."
 * confused
 * You merely identify the scroll.
 * "You identify this as an identify scroll."

Commentary
Wow! Reading a cursed scroll of identify is safe. Most cursed items cause something bad when you use them.

There is also a spellbook of identify, but that is a difficult spell. It is very convenient if you can learn it, but many characters cannot.

If you do not learn the identify spell, you will depend on these scrolls. It is advantageous to make holy water and bless your scrolls of identify, because that significantly increases their chance of identifying more items. It is also a good idea to gather many unidentified items into your inventory before reading the scrolls; if they are blessed, then the 20% chance of identifying everything is very significant.