In the past, buying from Coinbase was a hit or miss IMO. Sometimes they would ask for a valid ID, sometimes it would just slip through. the only other place, besides localbitcoins (which is a hassle, because most sellers want you to be verified anyway), would be the serpicoin exchange (serpicoin.com). They're swiss based and don't require validation by law. based on their website, they've been around long enough.
I just looked at serpicoin.com, 15% commission, surely that can't be right?
If you want to skip the whole verification crap, that's the price to pay i guess. At least they state the facts, other exchanges just shaft you on the spread.
IMO, if you want to invest, go through the process of verification and hold your coins. If you want to convert fiat to crypto fast, an exchange like serpicoin is the way to go. (Or localbitcoins, but the prices/spreads are usually insane where I'm from).