Changes prices, perhaps

• Marks up or down, perhaps
• Changes the price of, as at the supermarket
• Puts a new price label on
• Marks sales prices
• Changes a name on, as a Facebook photo
• Puts a sale sticker on, perhaps
• Labels again
• Puts a new price on
• Changes the price on

Wiktionary Word definitions in Wiktionary
vb. (en-third-person singular of: retag )