When he was alive, Prince made hundreds of millions of dollars — for record companies, concert venues and others. That much is certain. What’s less clear is how much he left behind and who’ll come forward to claim it.Less than a week after the pop star died and an outpouring of grief and nostalgia prompted fans to buy 2.3 million of his songs in three days, it’s still uncertain whether he left a will, or who will handle his estate.Prince owned a dozen properties in and around his famous Paisley Park …