Puts a new price on

• Labels anew
• Marks sales prices
• Changes a name on, as a Facebook photo
• Puts a sale sticker on, perhaps
• Puts a sale price on, maybe
• Puts a new price label on
• Puts new prices on, maybe
• Changes prices, perhaps

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