The current price of a Lo Rune is 22 - 25 fg (d2jsp forum gold) and the equivalent in rune value is 5x Ist - 5x Ist.
Price History
The chart below shows the price history of a Lo Rune in forum gold for the past few days.
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Rune Information
Lo RuneCan be Inserted into Socketed ItemsWeapons: +20% Deadly StrikeArmors: +5% to Maximum Lightning ResistHelms: +5% to Maximum Lightning ResistShield: +5% to Maximum Lightning ResistRequired Level: 59