Buy an (old) iPhone.
I've got a 5S -- still perfectly fast for what I use it for (email, youtube, brokerage account, general internet, some small games), and is getting OS updates and security patches until IOS11. It's $120 on eBay; a new screen can be had for $13, a new battery for $11. it's solidly designed and there's a gigantic field of accessories and apps.
Maybe titanium and no bezels are worth a price premium, but there's no way it's worth a 5x increase in price.