Changes the price of, as at the supermarket

• Changes a name on, as a Facebook photo
• Puts a new price on
• Marks up or down, say
• Marks down, perhaps
• Changes prices, perhaps
• Changes the price of
• Labels anew
• Marks up or down, perhaps

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