put a price (tag) on (something)
To determine a specific cost or attach a monetary value to something. We're just waiting for them to put a price tag on the project before we begin development. He thinks that flashing his money around will get him friends, but you can't put a price on true friendship.
put a ˈprice on something
give the value of something in money: Any businessman will tell you it’s hard to put a price on public confidence.I’ve never seen a vase like this before, so I’m afraid I can’t put a price on it.